%------------------------------------------------------------------------------
% File     : Z3---4.8.9.0
% Problem  : NUM376+1.020 : TPTP v8.1.0. Released v3.2.0.
% Transfm  : none
% Format   : tptp
% Command  : z3_tptp -proof -model -t:%d -file:%s

% Computer : n010.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 300s
% DateTime : Sun Sep 18 13:03:51 EDT 2022

% Result   : Unsatisfiable 0.20s 0.53s
% Output   : Proof 52.68s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.06/0.12  % Problem  : NUM376+1.020 : TPTP v8.1.0. Released v3.2.0.
% 0.06/0.13  % Command  : z3_tptp -proof -model -t:%d -file:%s
% 0.13/0.34  % Computer : n010.cluster.edu
% 0.13/0.34  % Model    : x86_64 x86_64
% 0.13/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.13/0.34  % Memory   : 8042.1875MB
% 0.13/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.13/0.34  % CPULimit : 300
% 0.13/0.34  % WCLimit  : 300
% 0.13/0.34  % DateTime : Fri Sep  2 09:53:58 EDT 2022
% 0.13/0.34  % CPUTime  : 
% 0.13/0.34  Z3tptp [4.8.9.0] (c) 2006-20**. Microsoft Corp.
% 0.13/0.34  Usage: tptp [options] [-file:]file
% 0.13/0.34    -h, -?       prints this message.
% 0.13/0.34    -smt2        print SMT-LIB2 benchmark.
% 0.13/0.34    -m, -model   generate model.
% 0.13/0.34    -p, -proof   generate proof.
% 0.13/0.34    -c, -core    generate unsat core of named formulas.
% 0.13/0.34    -st, -statistics display statistics.
% 0.13/0.34    -t:timeout   set timeout (in second).
% 0.13/0.34    -smt2status  display status in smt2 format instead of SZS.
% 0.13/0.34    -check_status check the status produced by Z3 against annotation in benchmark.
% 0.13/0.34    -<param>:<value> configuration parameter and value.
% 0.13/0.34    -o:<output-file> file to place output in.
% 0.20/0.53  % SZS status Unsatisfiable
% 0.20/0.53  % SZS output start Proof
% 0.20/0.53  tff(sum_type, type, (
% 0.20/0.53     sum: ( $i * $i ) > $i)).
% 0.20/0.53  tff(succ_type, type, (
% 0.20/0.53     succ: $i > $i)).
% 0.20/0.53  tff(tptp_fun_Y_0_type, type, (
% 0.20/0.53     tptp_fun_Y_0: $i)).
% 0.20/0.53  tff(pred_type, type, (
% 0.20/0.53     pred: $i > $i)).
% 0.20/0.53  tff(tptp_fun_X_1_type, type, (
% 0.20/0.53     tptp_fun_X_1: $i)).
% 0.20/0.53  tff(n7_type, type, (
% 0.20/0.53     n7: $i)).
% 0.20/0.53  tff(n5_type, type, (
% 0.20/0.53     n5: $i)).
% 0.20/0.53  tff(n15_type, type, (
% 0.20/0.53     n15: $i)).
% 0.20/0.53  tff(n13_type, type, (
% 0.20/0.53     n13: $i)).
% 0.20/0.53  tff(n20_type, type, (
% 0.20/0.53     n20: $i)).
% 0.20/0.53  tff(n19_type, type, (
% 0.20/0.53     n19: $i)).
% 0.20/0.53  tff(n18_type, type, (
% 0.20/0.53     n18: $i)).
% 0.20/0.53  tff(n17_type, type, (
% 0.20/0.53     n17: $i)).
% 0.20/0.53  tff(n16_type, type, (
% 0.20/0.53     n16: $i)).
% 0.20/0.53  tff(n14_type, type, (
% 0.20/0.53     n14: $i)).
% 0.20/0.53  tff(n12_type, type, (
% 0.20/0.53     n12: $i)).
% 0.20/0.53  tff(n11_type, type, (
% 0.20/0.53     n11: $i)).
% 0.20/0.53  tff(n10_type, type, (
% 0.20/0.53     n10: $i)).
% 0.20/0.53  tff(n9_type, type, (
% 0.20/0.53     n9: $i)).
% 0.20/0.53  tff(n8_type, type, (
% 0.20/0.53     n8: $i)).
% 0.20/0.53  tff(n6_type, type, (
% 0.20/0.53     n6: $i)).
% 0.20/0.53  tff(n4_type, type, (
% 0.20/0.53     n4: $i)).
% 0.20/0.53  tff(n3_type, type, (
% 0.20/0.53     n3: $i)).
% 0.20/0.53  tff(n2_type, type, (
% 0.20/0.53     n2: $i)).
% 0.20/0.53  tff(n1_type, type, (
% 0.20/0.53     n1: $i)).
% 0.20/0.53  tff(n0_type, type, (
% 0.20/0.53     n0: $i)).
% 0.20/0.53  tff(1,plain,
% 0.20/0.53      (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X!1 = n20) | (X!1 = n19) | (X!1 = n18) | (X!1 = n17) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2) | (X!1 = n1) | (X!1 = n0)) & ((Y!0 = n20) | (Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n11) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)) & (~(sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2) | (X!1 = n1) | (X!1 = n0)) & ((Y!0 = n20) | (Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n11) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)) & (~(sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))),
% 0.20/0.57      inference(rewrite,[status(thm)],[])).
% 0.20/0.57  tff(2,plain,
% 0.20/0.57      (?[X: $i, Y: $i] : ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20))) <=> ?[X: $i, Y: $i] : ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))),
% 0.51/0.64      inference(rewrite,[status(thm)],[])).
% 0.51/0.64  tff(3,plain,
% 0.51/0.64      (^[X: $i, Y: $i] : 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monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(rewrite((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3))), (((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3)) & (succ(n3) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3)) & (succ(n3) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4))), (((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4)))), ((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4)) & (succ(n4) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4)) & (succ(n4) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5))), ((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5)))), (((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5)) & (succ(n5) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5)) & (succ(n5) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6))), (((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6)))), ((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6)) & (succ(n6) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6)) & (succ(n6) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7))), ((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7)))), (((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7)) & (succ(n7) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7)) & (succ(n7) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8))), (((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8)))), ((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8)) & (succ(n8) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8)) & (succ(n8) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9))), ((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9)))), (((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9)) & (succ(n9) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9)) & (succ(n9) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10))), (((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10)))), ((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10)) & (succ(n10) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10)) & (succ(n10) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11))), ((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11)))), (((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11)) & (succ(n11) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11)) & (succ(n11) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12))), (((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12)))), ((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12)) & (succ(n12) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12)) & (succ(n12) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13))), ((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13)))), (((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13)) & (succ(n13) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13)) & (succ(n13) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14))), (((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14)))), ((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14)) & (succ(n14) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14)) & (succ(n14) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15))), ((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15)))), (((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15)) & (succ(n15) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15)) & (succ(n15) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16))), (((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16)))), ((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16)) & (succ(n16) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16)) & (succ(n16) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17))), ((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17)))), (((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17)) & (succ(n17) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17)) & (succ(n17) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18))), (((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18)))), ((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18)) & (succ(n18) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18)) & (succ(n18) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19))), ((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19)))), (((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19)) & (succ(n19) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19)) & (succ(n19) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20))), (((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20)))), ((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20)) & (succ(n20) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20)) & (succ(n20) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0))), ((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0)))), (((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0)) & (pred(n0) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0)) & (pred(n0) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20))), (((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20)))), ((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20)) & (pred(n1) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20)) & (pred(n1) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0))), ((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0)))), (((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0)) & (pred(n2) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0)) & (pred(n2) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1))), (((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1)))), ((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1)) & (pred(n3) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1)) & (pred(n3) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2))), ((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2)))), (((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2)) & (pred(n4) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2)) & (pred(n4) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3))), (((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3)))), ((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3)) & (pred(n5) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3)) & (pred(n5) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4))), ((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4)))), (((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4)) & (pred(n6) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4)) & (pred(n6) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5))), (((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5)))), ((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5)) & (pred(n7) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5)) & (pred(n7) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6))), ((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6)))), (((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6)) & (pred(n8) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6)) & (pred(n8) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7))), (((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7)))), ((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7)) & (pred(n9) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7)) & (pred(n9) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8))), ((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8)))), (((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8)) & (pred(n10) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8)) & (pred(n10) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9))), (((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9)))), ((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9)) & (pred(n11) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9)) & (pred(n11) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10))), ((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10)))), (((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10)) & (pred(n12) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10)) & (pred(n12) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11))), (((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11)))), ((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11)) & (pred(n13) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11)) & (pred(n13) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12))), ((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12)))), (((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12)) & (pred(n14) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12)) & (pred(n14) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13))), (((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13)))), ((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13)) & (pred(n15) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13)) & (pred(n15) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14))), ((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14)))), (((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14)) & (pred(n16) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14)) & (pred(n16) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15))), (((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15)))), ((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15)) & (pred(n17) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15)) & (pred(n17) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16))), ((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16)))), (((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16)) & (pred(n18) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16)) & (pred(n18) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17))), (((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17)))), ((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17)) & (pred(n19) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17)) & (pred(n19) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18))), ((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18)))), (((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18)) & (pred(n20) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18)) & (pred(n20) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19))), (((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19)) & (sum(n0, n0) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0))), ((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0)))), (((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1))), (((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1)))), ((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2))), ((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2)))), (((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3))), (((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3)))), ((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4))), ((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5))), (((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19)))), trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(rewrite((((X = n0) | (X = n1)) | (X = n2)) <=> ((X = n2) | (X = n1) | (X = n0))), (((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) <=> (((X = n2) | (X = n1) | (X = n0)) | (X = n3)))), rewrite((((X = n2) | (X = n1) | (X = n0)) | (X = n3)) <=> ((X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) <=> ((X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) <=> (((X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n4)))), rewrite((((X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n4)) <=> ((X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) <=> ((X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) <=> (((X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n5)))), rewrite((((X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n5)) <=> ((X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) <=> ((X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) <=> (((X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n6)))), rewrite((((X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n6)) <=> ((X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) <=> ((X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) <=> (((X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n7)))), rewrite((((X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n7)) <=> ((X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) <=> ((X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) <=> (((X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n8)))), rewrite((((X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n8)) <=> ((X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) <=> ((X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) <=> (((X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n9)))), rewrite((((X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n9)) <=> ((X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) <=> ((X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) <=> (((X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n10)))), rewrite((((X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n10)) <=> ((X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) <=> ((X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) <=> (((X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n11)))), rewrite((((X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n11)) <=> ((X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) <=> ((X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) <=> (((X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n12)))), rewrite((((X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n12)) <=> ((X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) <=> ((X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) <=> (((X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n13)))), rewrite((((X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n13)) <=> ((X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) <=> ((X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) <=> (((X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n14)))), rewrite((((X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n14)) <=> ((X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) <=> ((X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) <=> (((X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n15)))), rewrite((((X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n15)) <=> ((X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) <=> ((X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) <=> (((X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n16)))), rewrite((((X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n16)) <=> ((X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) <=> ((X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) <=> (((X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n17)))), rewrite((((X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n17)) <=> ((X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) <=> ((X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) <=> (((X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n18)))), rewrite((((X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n18)) <=> ((X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) <=> ((X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) <=> (((X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n19)))), rewrite((((X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n19)) <=> ((X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) <=> ((X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), ((((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20)) <=> (((X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n20)))), rewrite((((X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) | (X = n20)) <=> ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))), ((((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20)) <=> ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19)) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19)) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))))), trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(trans(monotonicity(rewrite((((Y = n0) | (Y = n1)) | (Y = n2)) <=> ((Y = n2) | (Y = n1) | (Y = n0))), (((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) <=> (((Y = n2) | (Y = n1) | (Y = n0)) | (Y = n3)))), rewrite((((Y = n2) | (Y = n1) | (Y = n0)) | (Y = n3)) <=> ((Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) <=> ((Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) <=> (((Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n4)))), rewrite((((Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n4)) <=> ((Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) <=> ((Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) <=> (((Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n5)))), rewrite((((Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n5)) <=> ((Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) <=> ((Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) <=> (((Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n6)))), rewrite((((Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n6)) <=> ((Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) <=> ((Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) <=> (((Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n7)))), rewrite((((Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n7)) <=> ((Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) <=> ((Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) <=> (((Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n8)))), rewrite((((Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n8)) <=> ((Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) <=> ((Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) <=> (((Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n9)))), rewrite((((Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n9)) <=> ((Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) <=> ((Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) <=> (((Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n10)))), rewrite((((Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n10)) <=> ((Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) <=> ((Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) <=> (((Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n11)))), rewrite((((Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n11)) <=> ((Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) <=> ((Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) <=> (((Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n12)))), rewrite((((Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n12)) <=> ((Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) <=> ((Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) <=> (((Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n13)))), rewrite((((Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n13)) <=> ((Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) <=> ((Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) <=> (((Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n14)))), rewrite((((Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n14)) <=> ((Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) <=> ((Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) <=> (((Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n15)))), rewrite((((Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n15)) <=> ((Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) <=> ((Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) <=> (((Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n16)))), rewrite((((Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n16)) <=> ((Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) <=> ((Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) <=> (((Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n17)))), rewrite((((Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n17)) <=> ((Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) <=> ((Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) <=> (((Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n18)))), rewrite((((Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n18)) <=> ((Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) <=> ((Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) <=> (((Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n19)))), rewrite((((Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n19)) <=> ((Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) <=> ((Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20)) <=> (((Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n20)))), rewrite((((Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) | (Y = n20)) <=> ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))), ((((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20)) <=> ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0))) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1))) & (~(n0 = n2))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1))) & (~(n0 = n2))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2))) & (~(n0 = n3))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2))) & (~(n0 = n3))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3))) & (~(n0 = n4))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3))) & (~(n0 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4))) & (~(n0 = n5))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4))) & (~(n0 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5))) & (~(n0 = n6))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5))) & (~(n0 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6))) & (~(n0 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6))) & (~(n0 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7))) & (~(n0 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7))) & (~(n0 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8))) & (~(n0 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8))) & (~(n0 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9))) & (~(n0 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9))) & (~(n0 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10))) & (~(n0 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10))) & (~(n0 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11))) & (~(n0 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11))) & (~(n0 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12))) & (~(n0 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12))) & (~(n0 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13))) & (~(n0 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13))) & (~(n0 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14))) & (~(n0 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14))) & (~(n0 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15))) & (~(n0 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15))) & (~(n0 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16))) & (~(n0 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16))) & (~(n0 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17))) & (~(n0 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17))) & (~(n0 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18))) & (~(n0 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18))) & (~(n0 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19))) & (~(n0 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19))) & (~(n0 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20))) & (~(n1 = n2))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20))) & (~(n1 = n2))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2))) & (~(n1 = n3))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2))) & (~(n1 = n3))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3))) & (~(n1 = n4))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3))) & (~(n1 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4))) & (~(n1 = n5))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4))) & (~(n1 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5))) & (~(n1 = n6))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5))) & (~(n1 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6))) & (~(n1 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6))) & (~(n1 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7))) & (~(n1 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7))) & (~(n1 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8))) & (~(n1 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8))) & (~(n1 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9))) & (~(n1 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9))) & (~(n1 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10))) & (~(n1 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10))) & (~(n1 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11))) & (~(n1 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11))) & (~(n1 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12))) & (~(n1 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12))) & (~(n1 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13))) & (~(n1 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13))) & (~(n1 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14))) & (~(n1 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14))) & (~(n1 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15))) & (~(n1 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15))) & (~(n1 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16))) & (~(n1 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16))) & (~(n1 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17))) & (~(n1 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17))) & (~(n1 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18))) & (~(n1 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18))) & (~(n1 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19))) & (~(n1 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19))) & (~(n1 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20))) & (~(n2 = n3))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20))) & (~(n2 = n3))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3))) & (~(n2 = n4))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3))) & (~(n2 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4))) & (~(n2 = n5))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4))) & (~(n2 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5))) & (~(n2 = n6))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5))) & (~(n2 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6))) & (~(n2 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6))) & (~(n2 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7))) & (~(n2 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7))) & (~(n2 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8))) & (~(n2 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8))) & (~(n2 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9))) & (~(n2 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9))) & (~(n2 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10))) & (~(n2 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10))) & (~(n2 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11))) & (~(n2 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11))) & (~(n2 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12))) & (~(n2 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12))) & (~(n2 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13))) & (~(n2 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13))) & (~(n2 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14))) & (~(n2 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14))) & (~(n2 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15))) & (~(n2 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15))) & (~(n2 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16))) & (~(n2 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16))) & (~(n2 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17))) & (~(n2 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17))) & (~(n2 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18))) & (~(n2 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18))) & (~(n2 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19))) & (~(n2 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19))) & (~(n2 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20))) & (~(n3 = n4))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20))) & (~(n3 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4))) & (~(n3 = n5))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4))) & (~(n3 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5))) & (~(n3 = n6))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5))) & (~(n3 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6))) & (~(n3 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6))) & (~(n3 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7))) & (~(n3 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7))) & (~(n3 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8))) & (~(n3 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8))) & (~(n3 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9))) & (~(n3 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9))) & (~(n3 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10))) & (~(n3 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10))) & (~(n3 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11))) & (~(n3 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11))) & (~(n3 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12))) & (~(n3 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12))) & (~(n3 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13))) & (~(n3 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13))) & (~(n3 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14))) & (~(n3 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14))) & (~(n3 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15))) & (~(n3 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15))) & (~(n3 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16))) & (~(n3 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16))) & (~(n3 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17))) & (~(n3 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17))) & (~(n3 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18))) & (~(n3 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18))) & (~(n3 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19))) & (~(n3 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19))) & (~(n3 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20))) & (~(n4 = n5))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20))) & (~(n4 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5))) & (~(n4 = n6))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5))) & (~(n4 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6))) & (~(n4 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6))) & (~(n4 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7))) & (~(n4 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7))) & (~(n4 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8))) & (~(n4 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8))) & (~(n4 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9))) & (~(n4 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9))) & (~(n4 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10))) & (~(n4 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10))) & (~(n4 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11))) & (~(n4 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11))) & (~(n4 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12))) & (~(n4 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12))) & (~(n4 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13))) & (~(n4 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13))) & (~(n4 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14))) & (~(n4 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14))) & (~(n4 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15))) & (~(n4 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15))) & (~(n4 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16))) & (~(n4 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16))) & (~(n4 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17))) & (~(n4 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17))) & (~(n4 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18))) & (~(n4 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18))) & (~(n4 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19))) & (~(n4 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19))) & (~(n4 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20))) & (~(n5 = n6))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20))) & (~(n5 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6))) & (~(n5 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6))) & (~(n5 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7))) & (~(n5 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7))) & (~(n5 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8))) & (~(n5 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8))) & (~(n5 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9))) & (~(n5 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9))) & (~(n5 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10))) & (~(n5 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10))) & (~(n5 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11))) & (~(n5 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11))) & (~(n5 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12))) & (~(n5 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12))) & (~(n5 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13))) & (~(n5 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13))) & (~(n5 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14))) & (~(n5 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14))) & (~(n5 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15))) & (~(n5 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15))) & (~(n5 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16))) & (~(n5 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16))) & (~(n5 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17))) & (~(n5 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17))) & (~(n5 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18))) & (~(n5 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18))) & (~(n5 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19))) & (~(n5 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19))) & (~(n5 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20))) & (~(n6 = n7))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20))) & (~(n6 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7))) & (~(n6 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7))) & (~(n6 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8))) & (~(n6 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8))) & (~(n6 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9))) & (~(n6 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9))) & (~(n6 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10))) & (~(n6 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10))) & (~(n6 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11))) & (~(n6 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11))) & (~(n6 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12))) & (~(n6 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12))) & (~(n6 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13))) & (~(n6 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13))) & (~(n6 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14))) & (~(n6 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14))) & (~(n6 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15))) & (~(n6 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15))) & (~(n6 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16))) & (~(n6 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16))) & (~(n6 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17))) & (~(n6 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17))) & (~(n6 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18))) & (~(n6 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18))) & (~(n6 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19))) & (~(n6 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19))) & (~(n6 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20))) & (~(n7 = n8))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20))) & (~(n7 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8))) & (~(n7 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8))) & (~(n7 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9))) & (~(n7 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9))) & (~(n7 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10))) & (~(n7 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10))) & (~(n7 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11))) & (~(n7 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11))) & (~(n7 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12))) & (~(n7 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12))) & (~(n7 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13))) & (~(n7 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13))) & (~(n7 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14))) & (~(n7 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14))) & (~(n7 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15))) & (~(n7 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15))) & (~(n7 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16))) & (~(n7 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16))) & (~(n7 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17))) & (~(n7 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17))) & (~(n7 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18))) & (~(n7 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18))) & (~(n7 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19))) & (~(n7 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19))) & (~(n7 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20))) & (~(n8 = n9))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20))) & (~(n8 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9))) & (~(n8 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9))) & (~(n8 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10))) & (~(n8 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10))) & (~(n8 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11))) & (~(n8 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11))) & (~(n8 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12))) & (~(n8 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12))) & (~(n8 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13))) & (~(n8 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13))) & (~(n8 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14))) & (~(n8 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14))) & (~(n8 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15))) & (~(n8 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15))) & (~(n8 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16))) & (~(n8 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16))) & (~(n8 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17))) & (~(n8 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17))) & (~(n8 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18))) & (~(n8 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18))) & (~(n8 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19))) & (~(n8 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19))) & (~(n8 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20))) & (~(n9 = n10))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20))) & (~(n9 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10))) & (~(n9 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10))) & (~(n9 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11))) & (~(n9 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11))) & (~(n9 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12))) & (~(n9 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12))) & (~(n9 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13))) & (~(n9 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13))) & (~(n9 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14))) & (~(n9 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14))) & (~(n9 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15))) & (~(n9 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15))) & (~(n9 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16))) & (~(n9 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16))) & (~(n9 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17))) & (~(n9 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17))) & (~(n9 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18))) & (~(n9 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18))) & (~(n9 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19))) & (~(n9 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19))) & (~(n9 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20))) & (~(n10 = n11))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20))) & (~(n10 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11))) & (~(n10 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11))) & (~(n10 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12))) & (~(n10 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12))) & (~(n10 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13))) & (~(n10 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13))) & (~(n10 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14))) & (~(n10 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14))) & (~(n10 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15))) & (~(n10 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15))) & (~(n10 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16))) & (~(n10 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16))) & (~(n10 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17))) & (~(n10 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17))) & (~(n10 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18))) & (~(n10 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18))) & (~(n10 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19))) & (~(n10 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19))) & (~(n10 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20))) & (~(n11 = n12))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20))) & (~(n11 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12))) & (~(n11 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12))) & (~(n11 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13))) & (~(n11 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13))) & (~(n11 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14))) & (~(n11 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14))) & (~(n11 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15))) & (~(n11 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15))) & (~(n11 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16))) & (~(n11 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16))) & (~(n11 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17))) & (~(n11 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17))) & (~(n11 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18))) & (~(n11 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18))) & (~(n11 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19))) & (~(n11 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19))) & (~(n11 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20))) & (~(n12 = n13))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20))) & (~(n12 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13))) & (~(n12 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13))) & (~(n12 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14))) & (~(n12 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14))) & (~(n12 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15))) & (~(n12 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15))) & (~(n12 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16))) & (~(n12 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16))) & (~(n12 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17))) & (~(n12 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17))) & (~(n12 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18))) & (~(n12 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18))) & (~(n12 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19))) & (~(n12 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19))) & (~(n12 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20))) & (~(n13 = n14))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20))) & (~(n13 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14))) & (~(n13 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14))) & (~(n13 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15))) & (~(n13 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15))) & (~(n13 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16))) & (~(n13 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16))) & (~(n13 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17))) & (~(n13 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17))) & (~(n13 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18))) & (~(n13 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18))) & (~(n13 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19))) & (~(n13 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19))) & (~(n13 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20))) & (~(n14 = n15))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20))) & (~(n14 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15))) & (~(n14 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15))) & (~(n14 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16))) & (~(n14 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16))) & (~(n14 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17))) & (~(n14 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17))) & (~(n14 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18))) & (~(n14 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18))) & (~(n14 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19))) & (~(n14 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19))) & (~(n14 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20))) & (~(n15 = n16))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20))) & (~(n15 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16))) & (~(n15 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16))) & (~(n15 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17))) & (~(n15 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17))) & (~(n15 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18))) & (~(n15 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18))) & (~(n15 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19))) & (~(n15 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19))) & (~(n15 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20))) & (~(n16 = n17))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20))) & (~(n16 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17))) & (~(n16 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17))) & (~(n16 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18))) & (~(n16 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18))) & (~(n16 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19))) & (~(n16 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19))) & (~(n16 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20))) & (~(n17 = n18))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20))) & (~(n17 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18))) & (~(n17 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18))) & (~(n17 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19))) & (~(n17 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19))) & (~(n17 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20))) & (~(n18 = n19))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20))) & (~(n18 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19))))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) & (~(n18 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19))) & (~(n18 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19))) & (~(n18 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)))), ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) & (~(n18 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20))))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) & (~(n18 = n20))) & (~(n19 = n20))) <=> (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20))) & (~(n19 = n20))))), rewrite((((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20))) & (~(n19 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))), (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) & (~(n18 = n20))) & (~(n19 = n20))) <=> ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))))),
% 52.31/52.59      inference(bind,[status(th)],[])).
% 52.31/52.59  tff(4,plain,
% 52.31/52.59      (?[X: $i, Y: $i] : ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) & (~(n18 = n20))) & (~(n19 = n20))) <=> ?[X: $i, Y: $i] : ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))),
% 52.31/52.61      inference(quant_intro,[status(thm)],[3])).
% 52.31/52.61  tff(5,axiom,(?[X: $i, Y: $i] : ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((succ(n0) = n1) & (succ(n1) = n2)) & (succ(n2) = n3)) & (succ(n3) = n4)) & (succ(n4) = n5)) & (succ(n5) = n6)) & (succ(n6) = n7)) & (succ(n7) = n8)) & (succ(n8) = n9)) & (succ(n9) = n10)) & (succ(n10) = n11)) & (succ(n11) = n12)) & (succ(n12) = n13)) & (succ(n13) = n14)) & (succ(n14) = n15)) & (succ(n15) = n16)) & (succ(n16) = n17)) & (succ(n17) = n18)) & (succ(n18) = n19)) & (succ(n19) = n20)) & (succ(n20) = n0)) & (pred(n0) = n20)) & (pred(n1) = n0)) & (pred(n2) = n1)) & (pred(n3) = n2)) & (pred(n4) = n3)) & (pred(n5) = n4)) & (pred(n6) = n5)) & (pred(n7) = n6)) & (pred(n8) = n7)) & (pred(n9) = n8)) & (pred(n10) = n9)) & (pred(n11) = n10)) & (pred(n12) = n11)) & (pred(n13) = n12)) & (pred(n14) = n13)) & (pred(n15) = n14)) & (pred(n16) = n15)) & (pred(n17) = n16)) & (pred(n18) = n17)) & (pred(n19) = n18)) & (pred(n20) = n19)) & (sum(n0, n0) = n0)) & (sum(n0, n1) = n1)) & (sum(n0, n2) = n2)) & (sum(n0, n3) = n3)) & (sum(n0, n4) = n4)) & (sum(n0, n5) = n5)) & (sum(n0, n6) = n6)) & (sum(n0, n7) = n7)) & (sum(n0, n8) = n8)) & (sum(n0, n9) = n9)) & (sum(n0, n10) = n10)) & (sum(n0, n11) = n11)) & (sum(n0, n12) = n12)) & (sum(n0, n13) = n13)) & (sum(n0, n14) = n14)) & (sum(n0, n15) = n15)) & (sum(n0, n16) = n16)) & (sum(n0, n17) = n17)) & (sum(n0, n18) = n18)) & (sum(n0, n19) = n19)) & (sum(n0, n20) = n20)) & (sum(n1, n0) = n1)) & (sum(n1, n1) = n2)) & (sum(n1, n2) = n3)) & (sum(n1, n3) = n4)) & (sum(n1, n4) = n5)) & (sum(n1, n5) = n6)) & (sum(n1, n6) = n7)) & (sum(n1, n7) = n8)) & (sum(n1, n8) = n9)) & (sum(n1, n9) = n10)) & (sum(n1, n10) = n11)) & (sum(n1, n11) = n12)) & (sum(n1, n12) = n13)) & (sum(n1, n13) = n14)) & (sum(n1, n14) = n15)) & (sum(n1, n15) = n16)) & (sum(n1, n16) = n17)) & (sum(n1, n17) = n18)) & (sum(n1, n18) = n19)) & (sum(n1, n19) = n20)) & (sum(n1, n20) = n0)) & (sum(n2, n0) = n2)) & (sum(n2, n1) = n3)) & (sum(n2, n2) = n4)) & (sum(n2, n3) = n5)) & (sum(n2, n4) = n6)) & (sum(n2, n5) = n7)) & (sum(n2, n6) = n8)) & (sum(n2, n7) = n9)) & (sum(n2, n8) = n10)) & (sum(n2, n9) = n11)) & (sum(n2, n10) = n12)) & (sum(n2, n11) = n13)) & (sum(n2, n12) = n14)) & (sum(n2, n13) = n15)) & (sum(n2, n14) = n16)) & (sum(n2, n15) = n17)) & (sum(n2, n16) = n18)) & (sum(n2, n17) = n19)) & (sum(n2, n18) = n20)) & (sum(n2, n19) = n0)) & (sum(n2, n20) = n1)) & (sum(n3, n0) = n3)) & (sum(n3, n1) = n4)) & (sum(n3, n2) = n5)) & (sum(n3, n3) = n6)) & (sum(n3, n4) = n7)) & (sum(n3, n5) = n8)) & (sum(n3, n6) = n9)) & (sum(n3, n7) = n10)) & (sum(n3, n8) = n11)) & (sum(n3, n9) = n12)) & (sum(n3, n10) = n13)) & (sum(n3, n11) = n14)) & (sum(n3, n12) = n15)) & (sum(n3, n13) = n16)) & (sum(n3, n14) = n17)) & (sum(n3, n15) = n18)) & (sum(n3, n16) = n19)) & (sum(n3, n17) = n20)) & (sum(n3, n18) = n0)) & (sum(n3, n19) = n1)) & (sum(n3, n20) = n2)) & (sum(n4, n0) = n4)) & (sum(n4, n1) = n5)) & (sum(n4, n2) = n6)) & (sum(n4, n3) = n7)) & (sum(n4, n4) = n8)) & (sum(n4, n5) = n9)) & (sum(n4, n6) = n10)) & (sum(n4, n7) = n11)) & (sum(n4, n8) = n12)) & (sum(n4, n9) = n13)) & (sum(n4, n10) = n14)) & (sum(n4, n11) = n15)) & (sum(n4, n12) = n16)) & (sum(n4, n13) = n17)) & (sum(n4, n14) = n18)) & (sum(n4, n15) = n19)) & (sum(n4, n16) = n20)) & (sum(n4, n17) = n0)) & (sum(n4, n18) = n1)) & (sum(n4, n19) = n2)) & (sum(n4, n20) = n3)) & (sum(n5, n0) = n5)) & (sum(n5, n1) = n6)) & (sum(n5, n2) = n7)) & (sum(n5, n3) = n8)) & (sum(n5, n4) = n9)) & (sum(n5, n5) = n10)) & (sum(n5, n6) = n11)) & (sum(n5, n7) = n12)) & (sum(n5, n8) = n13)) & (sum(n5, n9) = n14)) & (sum(n5, n10) = n15)) & (sum(n5, n11) = n16)) & (sum(n5, n12) = n17)) & (sum(n5, n13) = n18)) & (sum(n5, n14) = n19)) & (sum(n5, n15) = n20)) & (sum(n5, n16) = n0)) & (sum(n5, n17) = n1)) & (sum(n5, n18) = n2)) & (sum(n5, n19) = n3)) & (sum(n5, n20) = n4)) & (sum(n6, n0) = n6)) & (sum(n6, n1) = n7)) & (sum(n6, n2) = n8)) & (sum(n6, n3) = n9)) & (sum(n6, n4) = n10)) & (sum(n6, n5) = n11)) & (sum(n6, n6) = n12)) & (sum(n6, n7) = n13)) & (sum(n6, n8) = n14)) & (sum(n6, n9) = n15)) & (sum(n6, n10) = n16)) & (sum(n6, n11) = n17)) & (sum(n6, n12) = n18)) & (sum(n6, n13) = n19)) & (sum(n6, n14) = n20)) & (sum(n6, n15) = n0)) & (sum(n6, n16) = n1)) & (sum(n6, n17) = n2)) & (sum(n6, n18) = n3)) & (sum(n6, n19) = n4)) & (sum(n6, n20) = n5)) & (sum(n7, n0) = n7)) & (sum(n7, n1) = n8)) & (sum(n7, n2) = n9)) & (sum(n7, n3) = n10)) & (sum(n7, n4) = n11)) & (sum(n7, n5) = n12)) & (sum(n7, n6) = n13)) & (sum(n7, n7) = n14)) & (sum(n7, n8) = n15)) & (sum(n7, n9) = n16)) & (sum(n7, n10) = n17)) & (sum(n7, n11) = n18)) & (sum(n7, n12) = n19)) & (sum(n7, n13) = n20)) & (sum(n7, n14) = n0)) & (sum(n7, n15) = n1)) & (sum(n7, n16) = n2)) & (sum(n7, n17) = n3)) & (sum(n7, n18) = n4)) & (sum(n7, n19) = n5)) & (sum(n7, n20) = n6)) & (sum(n8, n0) = n8)) & (sum(n8, n1) = n9)) & (sum(n8, n2) = n10)) & (sum(n8, n3) = n11)) & (sum(n8, n4) = n12)) & (sum(n8, n5) = n13)) & (sum(n8, n6) = n14)) & (sum(n8, n7) = n15)) & (sum(n8, n8) = n16)) & (sum(n8, n9) = n17)) & (sum(n8, n10) = n18)) & (sum(n8, n11) = n19)) & (sum(n8, n12) = n20)) & (sum(n8, n13) = n0)) & (sum(n8, n14) = n1)) & (sum(n8, n15) = n2)) & (sum(n8, n16) = n3)) & (sum(n8, n17) = n4)) & (sum(n8, n18) = n5)) & (sum(n8, n19) = n6)) & (sum(n8, n20) = n7)) & (sum(n9, n0) = n9)) & (sum(n9, n1) = n10)) & (sum(n9, n2) = n11)) & (sum(n9, n3) = n12)) & (sum(n9, n4) = n13)) & (sum(n9, n5) = n14)) & (sum(n9, n6) = n15)) & (sum(n9, n7) = n16)) & (sum(n9, n8) = n17)) & (sum(n9, n9) = n18)) & (sum(n9, n10) = n19)) & (sum(n9, n11) = n20)) & (sum(n9, n12) = n0)) & (sum(n9, n13) = n1)) & (sum(n9, n14) = n2)) & (sum(n9, n15) = n3)) & (sum(n9, n16) = n4)) & (sum(n9, n17) = n5)) & (sum(n9, n18) = n6)) & (sum(n9, n19) = n7)) & (sum(n9, n20) = n8)) & (sum(n10, n0) = n10)) & (sum(n10, n1) = n11)) & (sum(n10, n2) = n12)) & (sum(n10, n3) = n13)) & (sum(n10, n4) = n14)) & (sum(n10, n5) = n15)) & (sum(n10, n6) = n16)) & (sum(n10, n7) = n17)) & (sum(n10, n8) = n18)) & (sum(n10, n9) = n19)) & (sum(n10, n10) = n20)) & (sum(n10, n11) = n0)) & (sum(n10, n12) = n1)) & (sum(n10, n13) = n2)) & (sum(n10, n14) = n3)) & (sum(n10, n15) = n4)) & (sum(n10, n16) = n5)) & (sum(n10, n17) = n6)) & (sum(n10, n18) = n7)) & (sum(n10, n19) = n8)) & (sum(n10, n20) = n9)) & (sum(n11, n0) = n11)) & (sum(n11, n1) = n12)) & (sum(n11, n2) = n13)) & (sum(n11, n3) = n14)) & (sum(n11, n4) = n15)) & (sum(n11, n5) = n16)) & (sum(n11, n6) = n17)) & (sum(n11, n7) = n18)) & (sum(n11, n8) = n19)) & (sum(n11, n9) = n20)) & (sum(n11, n10) = n0)) & (sum(n11, n11) = n1)) & (sum(n11, n12) = n2)) & (sum(n11, n13) = n3)) & (sum(n11, n14) = n4)) & (sum(n11, n15) = n5)) & (sum(n11, n16) = n6)) & (sum(n11, n17) = n7)) & (sum(n11, n18) = n8)) & (sum(n11, n19) = n9)) & (sum(n11, n20) = n10)) & (sum(n12, n0) = n12)) & (sum(n12, n1) = n13)) & (sum(n12, n2) = n14)) & (sum(n12, n3) = n15)) & (sum(n12, n4) = n16)) & (sum(n12, n5) = n17)) & (sum(n12, n6) = n18)) & (sum(n12, n7) = n19)) & (sum(n12, n8) = n20)) & (sum(n12, n9) = n0)) & (sum(n12, n10) = n1)) & (sum(n12, n11) = n2)) & (sum(n12, n12) = n3)) & (sum(n12, n13) = n4)) & (sum(n12, n14) = n5)) & (sum(n12, n15) = n6)) & (sum(n12, n16) = n7)) & (sum(n12, n17) = n8)) & (sum(n12, n18) = n9)) & (sum(n12, n19) = n10)) & (sum(n12, n20) = n11)) & (sum(n13, n0) = n13)) & (sum(n13, n1) = n14)) & (sum(n13, n2) = n15)) & (sum(n13, n3) = n16)) & (sum(n13, n4) = n17)) & (sum(n13, n5) = n18)) & (sum(n13, n6) = n19)) & (sum(n13, n7) = n20)) & (sum(n13, n8) = n0)) & (sum(n13, n9) = n1)) & (sum(n13, n10) = n2)) & (sum(n13, n11) = n3)) & (sum(n13, n12) = n4)) & (sum(n13, n13) = n5)) & (sum(n13, n14) = n6)) & (sum(n13, n15) = n7)) & (sum(n13, n16) = n8)) & (sum(n13, n17) = n9)) & (sum(n13, n18) = n10)) & (sum(n13, n19) = n11)) & (sum(n13, n20) = n12)) & (sum(n14, n0) = n14)) & (sum(n14, n1) = n15)) & (sum(n14, n2) = n16)) & (sum(n14, n3) = n17)) & (sum(n14, n4) = n18)) & (sum(n14, n5) = n19)) & (sum(n14, n6) = n20)) & (sum(n14, n7) = n0)) & (sum(n14, n8) = n1)) & (sum(n14, n9) = n2)) & (sum(n14, n10) = n3)) & (sum(n14, n11) = n4)) & (sum(n14, n12) = n5)) & (sum(n14, n13) = n6)) & (sum(n14, n14) = n7)) & (sum(n14, n15) = n8)) & (sum(n14, n16) = n9)) & (sum(n14, n17) = n10)) & (sum(n14, n18) = n11)) & (sum(n14, n19) = n12)) & (sum(n14, n20) = n13)) & (sum(n15, n0) = n15)) & (sum(n15, n1) = n16)) & (sum(n15, n2) = n17)) & (sum(n15, n3) = n18)) & (sum(n15, n4) = n19)) & (sum(n15, n5) = n20)) & (sum(n15, n6) = n0)) & (sum(n15, n7) = n1)) & (sum(n15, n8) = n2)) & (sum(n15, n9) = n3)) & (sum(n15, n10) = n4)) & (sum(n15, n11) = n5)) & (sum(n15, n12) = n6)) & (sum(n15, n13) = n7)) & (sum(n15, n14) = n8)) & (sum(n15, n15) = n9)) & (sum(n15, n16) = n10)) & (sum(n15, n17) = n11)) & (sum(n15, n18) = n12)) & (sum(n15, n19) = n13)) & (sum(n15, n20) = n14)) & (sum(n16, n0) = n16)) & (sum(n16, n1) = n17)) & (sum(n16, n2) = n18)) & (sum(n16, n3) = n19)) & (sum(n16, n4) = n20)) & (sum(n16, n5) = n0)) & (sum(n16, n6) = n1)) & (sum(n16, n7) = n2)) & (sum(n16, n8) = n3)) & (sum(n16, n9) = n4)) & (sum(n16, n10) = n5)) & (sum(n16, n11) = n6)) & (sum(n16, n12) = n7)) & (sum(n16, n13) = n8)) & (sum(n16, n14) = n9)) & (sum(n16, n15) = n10)) & (sum(n16, n16) = n11)) & (sum(n16, n17) = n12)) & (sum(n16, n18) = n13)) & (sum(n16, n19) = n14)) & (sum(n16, n20) = n15)) & (sum(n17, n0) = n17)) & (sum(n17, n1) = n18)) & (sum(n17, n2) = n19)) & (sum(n17, n3) = n20)) & (sum(n17, n4) = n0)) & (sum(n17, n5) = n1)) & (sum(n17, n6) = n2)) & (sum(n17, n7) = n3)) & (sum(n17, n8) = n4)) & (sum(n17, n9) = n5)) & (sum(n17, n10) = n6)) & (sum(n17, n11) = n7)) & (sum(n17, n12) = n8)) & (sum(n17, n13) = n9)) & (sum(n17, n14) = n10)) & (sum(n17, n15) = n11)) & (sum(n17, n16) = n12)) & (sum(n17, n17) = n13)) & (sum(n17, n18) = n14)) & (sum(n17, n19) = n15)) & (sum(n17, n20) = n16)) & (sum(n18, n0) = n18)) & (sum(n18, n1) = n19)) & (sum(n18, n2) = n20)) & (sum(n18, n3) = n0)) & (sum(n18, n4) = n1)) & (sum(n18, n5) = n2)) & (sum(n18, n6) = n3)) & (sum(n18, n7) = n4)) & (sum(n18, n8) = n5)) & (sum(n18, n9) = n6)) & (sum(n18, n10) = n7)) & (sum(n18, n11) = n8)) & (sum(n18, n12) = n9)) & (sum(n18, n13) = n10)) & (sum(n18, n14) = n11)) & (sum(n18, n15) = n12)) & (sum(n18, n16) = n13)) & (sum(n18, n17) = n14)) & (sum(n18, n18) = n15)) & (sum(n18, n19) = n16)) & (sum(n18, n20) = n17)) & (sum(n19, n0) = n19)) & (sum(n19, n1) = n20)) & (sum(n19, n2) = n0)) & (sum(n19, n3) = n1)) & (sum(n19, n4) = n2)) & (sum(n19, n5) = n3)) & (sum(n19, n6) = n4)) & (sum(n19, n7) = n5)) & (sum(n19, n8) = n6)) & (sum(n19, n9) = n7)) & (sum(n19, n10) = n8)) & (sum(n19, n11) = n9)) & (sum(n19, n12) = n10)) & (sum(n19, n13) = n11)) & (sum(n19, n14) = n12)) & (sum(n19, n15) = n13)) & (sum(n19, n16) = n14)) & (sum(n19, n17) = n15)) & (sum(n19, n18) = n16)) & (sum(n19, n19) = n17)) & (sum(n19, n20) = n18)) & (sum(n20, n0) = n20)) & (sum(n20, n1) = n0)) & (sum(n20, n2) = n1)) & (sum(n20, n3) = n2)) & (sum(n20, n4) = n3)) & (sum(n20, n5) = n4)) & (sum(n20, n6) = n5)) & (sum(n20, n7) = n6)) & (sum(n20, n8) = n7)) & (sum(n20, n9) = n8)) & (sum(n20, n10) = n9)) & (sum(n20, n11) = n10)) & (sum(n20, n12) = n11)) & (sum(n20, n13) = n12)) & (sum(n20, n14) = n13)) & (sum(n20, n15) = n14)) & (sum(n20, n16) = n15)) & (sum(n20, n17) = n16)) & (sum(n20, n18) = n17)) & (sum(n20, n19) = n18)) & (sum(n20, n20) = n19)) & (((((((((((((((((((((X = n0) | (X = n1)) | (X = n2)) | (X = n3)) | (X = n4)) | (X = n5)) | (X = n6)) | (X = n7)) | (X = n8)) | (X = n9)) | (X = n10)) | (X = n11)) | (X = n12)) | (X = n13)) | (X = n14)) | (X = n15)) | (X = n16)) | (X = n17)) | (X = n18)) | (X = n19)) | (X = n20))) & (((((((((((((((((((((Y = n0) | (Y = n1)) | (Y = n2)) | (Y = n3)) | (Y = n4)) | (Y = n5)) | (Y = n6)) | (Y = n7)) | (Y = n8)) | (Y = n9)) | (Y = n10)) | (Y = n11)) | (Y = n12)) | (Y = n13)) | (Y = n14)) | (Y = n15)) | (Y = n16)) | (Y = n17)) | (Y = n18)) | (Y = n19)) | (Y = n20))) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y)))))) & (~(n0 = n1))) & (~(n0 = n2))) & (~(n0 = n3))) & (~(n0 = n4))) & (~(n0 = n5))) & (~(n0 = n6))) & (~(n0 = n7))) & (~(n0 = n8))) & (~(n0 = n9))) & (~(n0 = n10))) & (~(n0 = n11))) & (~(n0 = n12))) & (~(n0 = n13))) & (~(n0 = n14))) & (~(n0 = n15))) & (~(n0 = n16))) & (~(n0 = n17))) & (~(n0 = n18))) & (~(n0 = n19))) & (~(n0 = n20))) & (~(n1 = n2))) & (~(n1 = n3))) & (~(n1 = n4))) & (~(n1 = n5))) & (~(n1 = n6))) & (~(n1 = n7))) & (~(n1 = n8))) & (~(n1 = n9))) & (~(n1 = n10))) & (~(n1 = n11))) & (~(n1 = n12))) & (~(n1 = n13))) & (~(n1 = n14))) & (~(n1 = n15))) & (~(n1 = n16))) & (~(n1 = n17))) & (~(n1 = n18))) & (~(n1 = n19))) & (~(n1 = n20))) & (~(n2 = n3))) & (~(n2 = n4))) & (~(n2 = n5))) & (~(n2 = n6))) & (~(n2 = n7))) & (~(n2 = n8))) & (~(n2 = n9))) & (~(n2 = n10))) & (~(n2 = n11))) & (~(n2 = n12))) & (~(n2 = n13))) & (~(n2 = n14))) & (~(n2 = n15))) & (~(n2 = n16))) & (~(n2 = n17))) & (~(n2 = n18))) & (~(n2 = n19))) & (~(n2 = n20))) & (~(n3 = n4))) & (~(n3 = n5))) & (~(n3 = n6))) & (~(n3 = n7))) & (~(n3 = n8))) & (~(n3 = n9))) & (~(n3 = n10))) & (~(n3 = n11))) & (~(n3 = n12))) & (~(n3 = n13))) & (~(n3 = n14))) & (~(n3 = n15))) & (~(n3 = n16))) & (~(n3 = n17))) & (~(n3 = n18))) & (~(n3 = n19))) & (~(n3 = n20))) & (~(n4 = n5))) & (~(n4 = n6))) & (~(n4 = n7))) & (~(n4 = n8))) & (~(n4 = n9))) & (~(n4 = n10))) & (~(n4 = n11))) & (~(n4 = n12))) & (~(n4 = n13))) & (~(n4 = n14))) & (~(n4 = n15))) & (~(n4 = n16))) & (~(n4 = n17))) & (~(n4 = n18))) & (~(n4 = n19))) & (~(n4 = n20))) & (~(n5 = n6))) & (~(n5 = n7))) & (~(n5 = n8))) & (~(n5 = n9))) & (~(n5 = n10))) & (~(n5 = n11))) & (~(n5 = n12))) & (~(n5 = n13))) & (~(n5 = n14))) & (~(n5 = n15))) & (~(n5 = n16))) & (~(n5 = n17))) & (~(n5 = n18))) & (~(n5 = n19))) & (~(n5 = n20))) & (~(n6 = n7))) & (~(n6 = n8))) & (~(n6 = n9))) & (~(n6 = n10))) & (~(n6 = n11))) & (~(n6 = n12))) & (~(n6 = n13))) & (~(n6 = n14))) & (~(n6 = n15))) & (~(n6 = n16))) & (~(n6 = n17))) & (~(n6 = n18))) & (~(n6 = n19))) & (~(n6 = n20))) & (~(n7 = n8))) & (~(n7 = n9))) & (~(n7 = n10))) & (~(n7 = n11))) & (~(n7 = n12))) & (~(n7 = n13))) & (~(n7 = n14))) & (~(n7 = n15))) & (~(n7 = n16))) & (~(n7 = n17))) & (~(n7 = n18))) & (~(n7 = n19))) & (~(n7 = n20))) & (~(n8 = n9))) & (~(n8 = n10))) & (~(n8 = n11))) & (~(n8 = n12))) & (~(n8 = n13))) & (~(n8 = n14))) & (~(n8 = n15))) & (~(n8 = n16))) & (~(n8 = n17))) & (~(n8 = n18))) & (~(n8 = n19))) & (~(n8 = n20))) & (~(n9 = n10))) & (~(n9 = n11))) & (~(n9 = n12))) & (~(n9 = n13))) & (~(n9 = n14))) & (~(n9 = n15))) & (~(n9 = n16))) & (~(n9 = n17))) & (~(n9 = n18))) & (~(n9 = n19))) & (~(n9 = n20))) & (~(n10 = n11))) & (~(n10 = n12))) & (~(n10 = n13))) & (~(n10 = n14))) & (~(n10 = n15))) & (~(n10 = n16))) & (~(n10 = n17))) & (~(n10 = n18))) & (~(n10 = n19))) & (~(n10 = n20))) & (~(n11 = n12))) & (~(n11 = n13))) & (~(n11 = n14))) & (~(n11 = n15))) & (~(n11 = n16))) & (~(n11 = n17))) & (~(n11 = n18))) & (~(n11 = n19))) & (~(n11 = n20))) & (~(n12 = n13))) & (~(n12 = n14))) & (~(n12 = n15))) & (~(n12 = n16))) & (~(n12 = n17))) & (~(n12 = n18))) & (~(n12 = n19))) & (~(n12 = n20))) & (~(n13 = n14))) & (~(n13 = n15))) & (~(n13 = n16))) & (~(n13 = n17))) & (~(n13 = n18))) & (~(n13 = n19))) & (~(n13 = n20))) & (~(n14 = n15))) & (~(n14 = n16))) & (~(n14 = n17))) & (~(n14 = n18))) & (~(n14 = n19))) & (~(n14 = n20))) & (~(n15 = n16))) & (~(n15 = n17))) & (~(n15 = n18))) & (~(n15 = n19))) & (~(n15 = n20))) & (~(n16 = n17))) & (~(n16 = n18))) & (~(n16 = n19))) & (~(n16 = n20))) & (~(n17 = n18))) & (~(n17 = n19))) & (~(n17 = n20))) & (~(n18 = n19))) & (~(n18 = n20))) & (~(n19 = n20)))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','try_satisfy_this')).
% 52.31/52.63  tff(6,plain,
% 52.31/52.63      (?[X: $i, Y: $i] : ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))),
% 52.40/52.64      inference(modus_ponens,[status(thm)],[5, 4])).
% 52.40/52.64  tff(7,plain,
% 52.40/52.64      (?[X: $i, Y: $i] : ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X = n20) | (X = n19) | (X = n18) | (X = n17) | (X = n16) | (X = n15) | (X = n14) | (X = n13) | (X = n12) | (X = n11) | (X = n10) | (X = n9) | (X = n8) | (X = n7) | (X = n6) | (X = n5) | (X = n4) | (X = n3) | (X = n2) | (X = n1) | (X = n0)) & ((Y = n20) | (Y = n19) | (Y = n18) | (Y = n17) | (Y = n16) | (Y = n15) | (Y = n14) | (Y = n13) | (Y = n12) | (Y = n11) | (Y = n10) | (Y = n9) | (Y = n8) | (Y = n7) | (Y = n6) | (Y = n5) | (Y = n4) | (Y = n3) | (Y = n2) | (Y = n1) | (Y = n0)) & (~(sum(sum(pred(X), succ(Y)), sum(pred(Y), succ(X))) = sum(sum(pred(X), succ(X)), sum(pred(Y), succ(Y))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20)))),
% 52.40/52.65      inference(modus_ponens,[status(thm)],[6, 2])).
% 52.40/52.65  tff(8,plain,(
% 52.40/52.65      (succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X!1 = n20) | (X!1 = n19) | (X!1 = n18) | (X!1 = n17) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2) | (X!1 = n1) | (X!1 = n0)) & ((Y!0 = n20) | (Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n11) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)) & (~(sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20))),
% 52.40/52.67      inference(skolemize,[status(sab)],[7])).
% 52.40/52.67  tff(9,plain,
% 52.40/52.67      ((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2) | (X!1 = n1) | (X!1 = n0)) & ((Y!0 = n20) | (Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n11) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)) & (~(sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(n10 = n14)) & (~(n10 = n15)) & (~(n10 = n16)) & (~(n10 = n17)) & (~(n10 = n18)) & (~(n10 = n19)) & (~(n10 = n20)) & (~(n11 = n12)) & (~(n11 = n13)) & (~(n11 = n14)) & (~(n11 = n15)) & (~(n11 = n16)) & (~(n11 = n17)) & (~(n11 = n18)) & (~(n11 = n19)) & (~(n11 = n20)) & (~(n12 = n13)) & (~(n12 = n14)) & (~(n12 = n15)) & (~(n12 = n16)) & (~(n12 = n17)) & (~(n12 = n18)) & (~(n12 = n19)) & (~(n12 = n20)) & (~(n13 = n14)) & (~(n13 = n15)) & (~(n13 = n16)) & (~(n13 = n17)) & (~(n13 = n18)) & (~(n13 = n19)) & (~(n13 = n20)) & (~(n14 = n15)) & (~(n14 = n16)) & (~(n14 = n17)) & (~(n14 = n18)) & (~(n14 = n19)) & (~(n14 = n20)) & (~(n15 = n16)) & (~(n15 = n17)) & (~(n15 = n18)) & (~(n15 = n19)) & (~(n15 = n20)) & (~(n16 = n17)) & (~(n16 = n18)) & (~(n16 = n19)) & (~(n16 = n20)) & (~(n17 = n18)) & (~(n17 = n19)) & (~(n17 = n20)) & (~(n18 = n19)) & (~(n18 = n20)) & (~(n19 = n20))),
% 52.40/52.68      inference(modus_ponens,[status(thm)],[8, 1])).
% 52.40/52.68  tff(10,plain,
% 52.40/52.68      (sum(n13, n15) = n7),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(11,plain,
% 52.40/52.68      (succ(n14) = n15),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(12,plain,
% 52.40/52.68      (sum(n14, n16) = n9),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(13,plain,
% 52.40/52.68      (succ(n15) = n16),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(14,assumption,(Y!0 = n15), introduced(assumption)).
% 52.40/52.68  tff(15,plain,
% 52.40/52.68      (succ(Y!0) = succ(n15)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[14])).
% 52.40/52.68  tff(16,plain,
% 52.40/52.68      (succ(Y!0) = n16),
% 52.40/52.68      inference(transitivity,[status(thm)],[15, 13])).
% 52.40/52.68  tff(17,plain,
% 52.40/52.68      (pred(n15) = n14),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(18,plain,
% 52.40/52.68      (pred(Y!0) = pred(n15)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[14])).
% 52.40/52.68  tff(19,plain,
% 52.40/52.68      (pred(Y!0) = n14),
% 52.40/52.68      inference(transitivity,[status(thm)],[18, 17])).
% 52.40/52.68  tff(20,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(Y!0)) = sum(n14, n16)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[19, 16])).
% 52.40/52.68  tff(21,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(Y!0)) = n9),
% 52.40/52.68      inference(transitivity,[status(thm)],[20, 12])).
% 52.40/52.68  tff(22,plain,
% 52.40/52.68      (sum(n12, n14) = n5),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(23,plain,
% 52.40/52.68      (succ(n13) = n14),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(24,assumption,(~(X!1 = n13)), introduced(assumption)).
% 52.40/52.68  tff(25,plain,
% 52.40/52.68      (sum(n5, n7) = n12),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(26,plain,
% 52.40/52.68      (succ(n6) = n7),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(27,assumption,(Y!0 = n6), introduced(assumption)).
% 52.40/52.68  tff(28,plain,
% 52.40/52.68      (succ(Y!0) = succ(n6)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[27])).
% 52.40/52.68  tff(29,plain,
% 52.40/52.68      (succ(Y!0) = n7),
% 52.40/52.68      inference(transitivity,[status(thm)],[28, 26])).
% 52.40/52.68  tff(30,plain,
% 52.40/52.68      (pred(n6) = n5),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(31,plain,
% 52.40/52.68      (pred(Y!0) = pred(n6)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[27])).
% 52.40/52.68  tff(32,plain,
% 52.40/52.68      (pred(Y!0) = n5),
% 52.40/52.68      inference(transitivity,[status(thm)],[31, 30])).
% 52.40/52.68  tff(33,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(Y!0)) = sum(n5, n7)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[32, 29])).
% 52.40/52.68  tff(34,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(Y!0)) = n12),
% 52.40/52.68      inference(transitivity,[status(thm)],[33, 25])).
% 52.40/52.68  tff(35,plain,
% 52.40/52.68      (sum(n3, n5) = n8),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(36,plain,
% 52.40/52.68      (succ(n4) = n5),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(37,plain,
% 52.40/52.68      (sum(n6, n8) = n14),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(38,plain,
% 52.40/52.68      (succ(n7) = n8),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(39,assumption,(X!1 = n7), introduced(assumption)).
% 52.40/52.68  tff(40,plain,
% 52.40/52.68      (succ(X!1) = succ(n7)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[39])).
% 52.40/52.68  tff(41,plain,
% 52.40/52.68      (succ(X!1) = n8),
% 52.40/52.68      inference(transitivity,[status(thm)],[40, 38])).
% 52.40/52.68  tff(42,plain,
% 52.40/52.68      (pred(n7) = n6),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(43,plain,
% 52.40/52.68      (pred(X!1) = pred(n7)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[39])).
% 52.40/52.68  tff(44,plain,
% 52.40/52.68      (pred(X!1) = n6),
% 52.40/52.68      inference(transitivity,[status(thm)],[43, 42])).
% 52.40/52.68  tff(45,plain,
% 52.40/52.68      (sum(pred(X!1), succ(X!1)) = sum(n6, n8)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[44, 41])).
% 52.40/52.68  tff(46,plain,
% 52.40/52.68      (sum(pred(X!1), succ(X!1)) = n14),
% 52.40/52.68      inference(transitivity,[status(thm)],[45, 37])).
% 52.40/52.68  tff(47,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n12)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[46, 34])).
% 52.40/52.68  tff(48,plain,
% 52.40/52.68      (sum(n14, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(symmetry,[status(thm)],[47])).
% 52.40/52.68  tff(49,plain,
% 52.40/52.68      (sum(n14, n12) = n5),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(50,plain,
% 52.40/52.68      (n5 = sum(n14, n12)),
% 52.40/52.68      inference(symmetry,[status(thm)],[49])).
% 52.40/52.68  tff(51,plain,
% 52.40/52.68      (sum(n13, n13) = n5),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(52,plain,
% 52.40/52.68      (sum(n5, n8) = n13),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(53,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(X!1)) = sum(n5, n8)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[32, 41])).
% 52.40/52.68  tff(54,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.40/52.68      inference(transitivity,[status(thm)],[53, 52])).
% 52.40/52.68  tff(55,plain,
% 52.40/52.68      (sum(n6, n7) = n13),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(56,plain,
% 52.40/52.68      (sum(pred(X!1), succ(Y!0)) = sum(n6, n7)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[44, 29])).
% 52.40/52.68  tff(57,plain,
% 52.40/52.68      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.40/52.68      inference(transitivity,[status(thm)],[56, 55])).
% 52.40/52.68  tff(58,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[57, 54])).
% 52.40/52.68  tff(59,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(transitivity,[status(thm)],[58, 51, 50, 48])).
% 52.40/52.68  tff(60,plain,
% 52.40/52.68      (~(sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))))),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(61,plain,
% 52.40/52.68      ($false),
% 52.40/52.68      inference(unit_resolution,[status(thm)],[60, 59])).
% 52.40/52.68  tff(62,plain,((~(X!1 = n7)) | (~(Y!0 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.40/52.68  tff(63,plain,
% 52.40/52.68      (~(X!1 = n7)),
% 52.40/52.68      inference(unit_resolution,[status(thm)],[62, 27])).
% 52.40/52.68  tff(64,assumption,(X!1 = n15), introduced(assumption)).
% 52.40/52.68  tff(65,plain,
% 52.40/52.68      (succ(X!1) = succ(n15)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[64])).
% 52.40/52.68  tff(66,plain,
% 52.40/52.68      (succ(X!1) = n16),
% 52.40/52.68      inference(transitivity,[status(thm)],[65, 13])).
% 52.40/52.68  tff(67,plain,
% 52.40/52.68      (pred(X!1) = pred(n15)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[64])).
% 52.40/52.68  tff(68,plain,
% 52.40/52.68      (pred(X!1) = n14),
% 52.40/52.68      inference(transitivity,[status(thm)],[67, 17])).
% 52.40/52.68  tff(69,plain,
% 52.40/52.68      (sum(pred(X!1), succ(X!1)) = sum(n14, n16)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[68, 66])).
% 52.40/52.68  tff(70,plain,
% 52.40/52.68      (sum(pred(X!1), succ(X!1)) = n9),
% 52.40/52.68      inference(transitivity,[status(thm)],[69, 12])).
% 52.40/52.68  tff(71,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n12)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[70, 34])).
% 52.40/52.68  tff(72,plain,
% 52.40/52.68      (sum(n9, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(symmetry,[status(thm)],[71])).
% 52.40/52.68  tff(73,plain,
% 52.40/52.68      (sum(n9, n12) = n0),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(74,plain,
% 52.40/52.68      (n0 = sum(n9, n12)),
% 52.40/52.68      inference(symmetry,[status(thm)],[73])).
% 52.40/52.68  tff(75,plain,
% 52.40/52.68      (sum(n0, n0) = n0),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(76,plain,
% 52.40/52.68      (sum(n5, n16) = n0),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(77,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(X!1)) = sum(n5, n16)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[32, 66])).
% 52.40/52.68  tff(78,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.40/52.68      inference(transitivity,[status(thm)],[77, 76])).
% 52.40/52.68  tff(79,plain,
% 52.40/52.68      (sum(n14, n7) = n0),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(80,plain,
% 52.40/52.68      (sum(pred(X!1), succ(Y!0)) = sum(n14, n7)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[68, 29])).
% 52.40/52.68  tff(81,plain,
% 52.40/52.68      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.40/52.68      inference(transitivity,[status(thm)],[80, 79])).
% 52.40/52.68  tff(82,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[81, 78])).
% 52.40/52.68  tff(83,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(transitivity,[status(thm)],[82, 75, 74, 72])).
% 52.40/52.68  tff(84,plain,
% 52.40/52.68      ($false),
% 52.40/52.68      inference(unit_resolution,[status(thm)],[60, 83])).
% 52.40/52.68  tff(85,plain,((~(X!1 = n15)) | (~(Y!0 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.40/52.68  tff(86,plain,
% 52.40/52.68      (~(X!1 = n15)),
% 52.40/52.68      inference(unit_resolution,[status(thm)],[85, 27])).
% 52.40/52.68  tff(87,plain,
% 52.40/52.68      (sum(n4, n6) = n10),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(88,plain,
% 52.40/52.68      (succ(n5) = n6),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(89,assumption,(Y!0 = n5), introduced(assumption)).
% 52.40/52.68  tff(90,plain,
% 52.40/52.68      (succ(Y!0) = succ(n5)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[89])).
% 52.40/52.68  tff(91,plain,
% 52.40/52.68      (succ(Y!0) = n6),
% 52.40/52.68      inference(transitivity,[status(thm)],[90, 88])).
% 52.40/52.68  tff(92,plain,
% 52.40/52.68      (pred(n5) = n4),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(93,plain,
% 52.40/52.68      (pred(Y!0) = pred(n5)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[89])).
% 52.40/52.68  tff(94,plain,
% 52.40/52.68      (pred(Y!0) = n4),
% 52.40/52.68      inference(transitivity,[status(thm)],[93, 92])).
% 52.40/52.68  tff(95,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(Y!0)) = sum(n4, n6)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[94, 91])).
% 52.40/52.68  tff(96,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(Y!0)) = n10),
% 52.40/52.68      inference(transitivity,[status(thm)],[95, 87])).
% 52.40/52.68  tff(97,plain,
% 52.40/52.68      (sum(n11, n13) = n3),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(98,plain,
% 52.40/52.68      (succ(n12) = n13),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(99,assumption,(X!1 = n5), introduced(assumption)).
% 52.40/52.68  tff(100,plain,
% 52.40/52.68      (succ(X!1) = succ(n5)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[99])).
% 52.40/52.68  tff(101,plain,
% 52.40/52.68      (succ(X!1) = n6),
% 52.40/52.68      inference(transitivity,[status(thm)],[100, 88])).
% 52.40/52.68  tff(102,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(X!1)) = sum(n4, n6)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[94, 101])).
% 52.40/52.68  tff(103,plain,
% 52.40/52.68      (pred(n5) = pred(Y!0)),
% 52.40/52.68      inference(symmetry,[status(thm)],[93])).
% 52.40/52.68  tff(104,plain,
% 52.40/52.68      (pred(X!1) = pred(n5)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[99])).
% 52.40/52.68  tff(105,plain,
% 52.40/52.68      (pred(X!1) = pred(Y!0)),
% 52.40/52.68      inference(transitivity,[status(thm)],[104, 103])).
% 52.40/52.68  tff(106,plain,
% 52.40/52.68      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.40/52.68      inference(monotonicity,[status(thm)],[105])).
% 52.40/52.68  tff(107,plain,
% 52.40/52.68      (sum(pred(X!1), succ(X!1)) = n10),
% 52.40/52.68      inference(transitivity,[status(thm)],[106, 102, 87])).
% 52.40/52.68  tff(108,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n10)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[107, 96])).
% 52.40/52.68  tff(109,plain,
% 52.40/52.68      (sum(n10, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(symmetry,[status(thm)],[108])).
% 52.40/52.68  tff(110,plain,
% 52.40/52.68      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.40/52.68      inference(transitivity,[status(thm)],[102, 87])).
% 52.40/52.68  tff(111,plain,
% 52.40/52.68      (pred(X!1) = n4),
% 52.40/52.68      inference(transitivity,[status(thm)],[104, 92])).
% 52.40/52.68  tff(112,plain,
% 52.40/52.68      (sum(pred(X!1), succ(Y!0)) = sum(n4, n6)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[111, 91])).
% 52.40/52.68  tff(113,plain,
% 52.40/52.68      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.40/52.68      inference(transitivity,[status(thm)],[112, 87])).
% 52.40/52.68  tff(114,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[113, 110])).
% 52.40/52.68  tff(115,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(transitivity,[status(thm)],[114, 109])).
% 52.40/52.68  tff(116,plain,
% 52.40/52.68      ($false),
% 52.40/52.68      inference(unit_resolution,[status(thm)],[60, 115])).
% 52.40/52.68  tff(117,plain,((~(X!1 = n5)) | (~(Y!0 = n5))), inference(lemma,lemma(discharge,[]))).
% 52.40/52.68  tff(118,plain,
% 52.40/52.68      (~(X!1 = n5)),
% 52.40/52.68      inference(unit_resolution,[status(thm)],[117, 89])).
% 52.40/52.68  tff(119,plain,
% 52.40/52.68      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n10)),
% 52.40/52.68      inference(monotonicity,[status(thm)],[46, 96])).
% 52.40/52.68  tff(120,plain,
% 52.40/52.68      (sum(n14, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.40/52.68      inference(symmetry,[status(thm)],[119])).
% 52.40/52.68  tff(121,plain,
% 52.40/52.68      (sum(n14, n10) = n3),
% 52.40/52.68      inference(and_elim,[status(thm)],[9])).
% 52.40/52.68  tff(122,plain,
% 52.40/52.68      (n3 = sum(n14, n10)),
% 52.40/52.68      inference(symmetry,[status(thm)],[121])).
% 52.40/52.68  tff(123,plain,
% 52.40/52.68      (sum(n12, n12) = n3),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(124,plain,
% 52.45/52.68      (sum(n4, n8) = n12),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(125,plain,
% 52.45/52.68      (sum(pred(Y!0), succ(X!1)) = sum(n4, n8)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[94, 41])).
% 52.45/52.68  tff(126,plain,
% 52.45/52.68      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.68      inference(transitivity,[status(thm)],[125, 124])).
% 52.45/52.68  tff(127,plain,
% 52.45/52.68      (sum(n6, n6) = n12),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(128,plain,
% 52.45/52.68      (sum(pred(X!1), succ(Y!0)) = sum(n6, n6)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[44, 91])).
% 52.45/52.68  tff(129,plain,
% 52.45/52.68      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.68      inference(transitivity,[status(thm)],[128, 127])).
% 52.45/52.68  tff(130,plain,
% 52.45/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[129, 126])).
% 52.45/52.68  tff(131,plain,
% 52.45/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.68      inference(transitivity,[status(thm)],[130, 123, 122, 120])).
% 52.45/52.68  tff(132,plain,
% 52.45/52.68      ($false),
% 52.45/52.68      inference(unit_resolution,[status(thm)],[60, 131])).
% 52.45/52.68  tff(133,plain,((~(X!1 = n7)) | (~(Y!0 = n5))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.68  tff(134,plain,
% 52.45/52.68      (~(X!1 = n7)),
% 52.45/52.68      inference(unit_resolution,[status(thm)],[133, 89])).
% 52.45/52.68  tff(135,plain,
% 52.45/52.68      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n10)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[70, 96])).
% 52.45/52.68  tff(136,plain,
% 52.45/52.68      (sum(n9, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.68      inference(symmetry,[status(thm)],[135])).
% 52.45/52.68  tff(137,plain,
% 52.45/52.68      (sum(n9, n10) = n19),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(138,plain,
% 52.45/52.68      (n19 = sum(n9, n10)),
% 52.45/52.68      inference(symmetry,[status(thm)],[137])).
% 52.45/52.68  tff(139,plain,
% 52.45/52.68      (sum(n20, n20) = n19),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(140,plain,
% 52.45/52.68      (sum(n4, n16) = n20),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(141,plain,
% 52.45/52.68      (sum(pred(Y!0), succ(X!1)) = sum(n4, n16)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[94, 66])).
% 52.45/52.68  tff(142,plain,
% 52.45/52.68      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.45/52.68      inference(transitivity,[status(thm)],[141, 140])).
% 52.45/52.68  tff(143,plain,
% 52.45/52.68      (sum(n14, n6) = n20),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(144,plain,
% 52.45/52.68      (sum(pred(X!1), succ(Y!0)) = sum(n14, n6)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[68, 91])).
% 52.45/52.68  tff(145,plain,
% 52.45/52.68      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.45/52.68      inference(transitivity,[status(thm)],[144, 143])).
% 52.45/52.68  tff(146,plain,
% 52.45/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[145, 142])).
% 52.45/52.68  tff(147,plain,
% 52.45/52.68      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.68      inference(transitivity,[status(thm)],[146, 139, 138, 136])).
% 52.45/52.68  tff(148,plain,
% 52.45/52.68      ($false),
% 52.45/52.68      inference(unit_resolution,[status(thm)],[60, 147])).
% 52.45/52.68  tff(149,plain,((~(X!1 = n15)) | (~(Y!0 = n5))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.68  tff(150,plain,
% 52.45/52.68      (~(X!1 = n15)),
% 52.45/52.68      inference(unit_resolution,[status(thm)],[149, 89])).
% 52.45/52.68  tff(151,plain,
% 52.45/52.68      (sum(n8, n10) = n18),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(152,plain,
% 52.45/52.68      (succ(n9) = n10),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(153,assumption,(Y!0 = n9), introduced(assumption)).
% 52.45/52.68  tff(154,plain,
% 52.45/52.68      (succ(Y!0) = succ(n9)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[153])).
% 52.45/52.68  tff(155,plain,
% 52.45/52.68      (succ(Y!0) = n10),
% 52.45/52.68      inference(transitivity,[status(thm)],[154, 152])).
% 52.45/52.68  tff(156,plain,
% 52.45/52.68      (pred(n9) = n8),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(157,plain,
% 52.45/52.68      (pred(Y!0) = pred(n9)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[153])).
% 52.45/52.68  tff(158,plain,
% 52.45/52.68      (pred(Y!0) = n8),
% 52.45/52.68      inference(transitivity,[status(thm)],[157, 156])).
% 52.45/52.68  tff(159,plain,
% 52.45/52.68      (sum(pred(Y!0), succ(Y!0)) = sum(n8, n10)),
% 52.45/52.68      inference(monotonicity,[status(thm)],[158, 155])).
% 52.45/52.68  tff(160,plain,
% 52.45/52.68      (sum(pred(Y!0), succ(Y!0)) = n18),
% 52.45/52.68      inference(transitivity,[status(thm)],[159, 151])).
% 52.45/52.68  tff(161,plain,
% 52.45/52.68      (sum(n10, n12) = n1),
% 52.45/52.68      inference(and_elim,[status(thm)],[9])).
% 52.45/52.68  tff(162,plain,
% 52.45/52.68      (succ(n11) = n12),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(163,assumption,(X!1 = n4), introduced(assumption)).
% 52.45/52.69  tff(164,plain,
% 52.45/52.69      (succ(X!1) = succ(n4)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[163])).
% 52.45/52.69  tff(165,plain,
% 52.45/52.69      (succ(X!1) = n5),
% 52.45/52.69      inference(transitivity,[status(thm)],[164, 36])).
% 52.45/52.69  tff(166,plain,
% 52.45/52.69      (pred(n4) = n3),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(167,plain,
% 52.45/52.69      (pred(X!1) = pred(n4)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[163])).
% 52.45/52.69  tff(168,plain,
% 52.45/52.69      (pred(X!1) = n3),
% 52.45/52.69      inference(transitivity,[status(thm)],[167, 166])).
% 52.45/52.69  tff(169,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = sum(n3, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[168, 165])).
% 52.45/52.69  tff(170,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = n8),
% 52.45/52.69      inference(transitivity,[status(thm)],[169, 35])).
% 52.45/52.69  tff(171,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n18)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[170, 160])).
% 52.45/52.69  tff(172,plain,
% 52.45/52.69      (sum(n8, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[171])).
% 52.45/52.69  tff(173,plain,
% 52.45/52.69      (sum(n8, n18) = n5),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(174,plain,
% 52.45/52.69      (n5 = sum(n8, n18)),
% 52.45/52.69      inference(symmetry,[status(thm)],[173])).
% 52.45/52.69  tff(175,plain,
% 52.45/52.69      (sum(n8, n5) = n13),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(176,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n8, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[158, 165])).
% 52.45/52.69  tff(177,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.69      inference(transitivity,[status(thm)],[176, 175])).
% 52.45/52.69  tff(178,plain,
% 52.45/52.69      (sum(n3, n10) = n13),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(179,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n3, n10)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[168, 155])).
% 52.45/52.69  tff(180,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.69      inference(transitivity,[status(thm)],[179, 178])).
% 52.45/52.69  tff(181,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[180, 177])).
% 52.45/52.69  tff(182,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[181, 51, 174, 172])).
% 52.45/52.69  tff(183,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 182])).
% 52.45/52.69  tff(184,plain,((~(X!1 = n4)) | (~(Y!0 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(185,plain,
% 52.45/52.69      (~(X!1 = n4)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[184, 153])).
% 52.45/52.69  tff(186,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = sum(n4, n6)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[111, 101])).
% 52.45/52.69  tff(187,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = n10),
% 52.45/52.69      inference(transitivity,[status(thm)],[186, 87])).
% 52.45/52.69  tff(188,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n18)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[187, 160])).
% 52.45/52.69  tff(189,plain,
% 52.45/52.69      (sum(n10, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[188])).
% 52.45/52.69  tff(190,plain,
% 52.45/52.69      (sum(n10, n18) = n7),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(191,plain,
% 52.45/52.69      (n7 = sum(n10, n18)),
% 52.45/52.69      inference(symmetry,[status(thm)],[190])).
% 52.45/52.69  tff(192,plain,
% 52.45/52.69      (sum(n14, n14) = n7),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(193,plain,
% 52.45/52.69      (sum(n8, n6) = n14),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(194,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n8, n6)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[158, 101])).
% 52.45/52.69  tff(195,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.45/52.69      inference(transitivity,[status(thm)],[194, 193])).
% 52.45/52.69  tff(196,plain,
% 52.45/52.69      (sum(n4, n10) = n14),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(197,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n4, n10)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[111, 155])).
% 52.45/52.69  tff(198,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.45/52.69      inference(transitivity,[status(thm)],[197, 196])).
% 52.45/52.69  tff(199,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[198, 195])).
% 52.45/52.69  tff(200,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[199, 192, 191, 189])).
% 52.45/52.69  tff(201,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 200])).
% 52.45/52.69  tff(202,plain,((~(X!1 = n5)) | (~(Y!0 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(203,plain,
% 52.45/52.69      (~(X!1 = n5)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[202, 153])).
% 52.45/52.69  tff(204,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n18)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[46, 160])).
% 52.45/52.69  tff(205,plain,
% 52.45/52.69      (sum(n14, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[204])).
% 52.45/52.69  tff(206,plain,
% 52.45/52.69      (sum(n14, n18) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(207,plain,
% 52.45/52.69      (n11 = sum(n14, n18)),
% 52.45/52.69      inference(symmetry,[status(thm)],[206])).
% 52.45/52.69  tff(208,plain,
% 52.45/52.69      (sum(n16, n16) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(209,plain,
% 52.45/52.69      (sum(n8, n8) = n16),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(210,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n8, n8)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[158, 41])).
% 52.45/52.69  tff(211,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.69      inference(transitivity,[status(thm)],[210, 209])).
% 52.45/52.69  tff(212,plain,
% 52.45/52.69      (sum(n6, n10) = n16),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(213,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n6, n10)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[44, 155])).
% 52.45/52.69  tff(214,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.69      inference(transitivity,[status(thm)],[213, 212])).
% 52.45/52.69  tff(215,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[214, 211])).
% 52.45/52.69  tff(216,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[215, 208, 207, 205])).
% 52.45/52.69  tff(217,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 216])).
% 52.45/52.69  tff(218,plain,((~(X!1 = n7)) | (~(Y!0 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(219,plain,
% 52.45/52.69      (~(X!1 = n7)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[218, 153])).
% 52.45/52.69  tff(220,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n18)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[70, 160])).
% 52.45/52.69  tff(221,plain,
% 52.45/52.69      (sum(n9, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[220])).
% 52.45/52.69  tff(222,plain,
% 52.45/52.69      (sum(n9, n18) = n6),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(223,plain,
% 52.45/52.69      (n6 = sum(n9, n18)),
% 52.45/52.69      inference(symmetry,[status(thm)],[222])).
% 52.45/52.69  tff(224,plain,
% 52.45/52.69      (sum(n3, n3) = n6),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(225,plain,
% 52.45/52.69      (sum(n8, n16) = n3),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(226,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n8, n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[158, 66])).
% 52.45/52.69  tff(227,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.69      inference(transitivity,[status(thm)],[226, 225])).
% 52.45/52.69  tff(228,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n14, n10)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[68, 155])).
% 52.45/52.69  tff(229,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.69      inference(transitivity,[status(thm)],[228, 121])).
% 52.45/52.69  tff(230,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[229, 227])).
% 52.45/52.69  tff(231,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[230, 224, 223, 221])).
% 52.45/52.69  tff(232,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 231])).
% 52.45/52.69  tff(233,plain,((~(X!1 = n15)) | (~(Y!0 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(234,plain,
% 52.45/52.69      (~(X!1 = n15)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[233, 153])).
% 52.45/52.69  tff(235,assumption,(X!1 = n10), introduced(assumption)).
% 52.45/52.69  tff(236,plain,
% 52.45/52.69      (sum(n9, n11) = n20),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(237,plain,
% 52.45/52.69      (succ(n10) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(238,plain,
% 52.45/52.69      (succ(X!1) = succ(n10)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[235])).
% 52.45/52.69  tff(239,plain,
% 52.45/52.69      (succ(X!1) = n11),
% 52.45/52.69      inference(transitivity,[status(thm)],[238, 237])).
% 52.45/52.69  tff(240,plain,
% 52.45/52.69      (pred(n10) = n9),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(241,plain,
% 52.45/52.69      (pred(X!1) = pred(n10)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[235])).
% 52.45/52.69  tff(242,plain,
% 52.45/52.69      (pred(X!1) = n9),
% 52.45/52.69      inference(transitivity,[status(thm)],[241, 240])).
% 52.45/52.69  tff(243,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = sum(n9, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[242, 239])).
% 52.45/52.69  tff(244,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = n20),
% 52.45/52.69      inference(transitivity,[status(thm)],[243, 236])).
% 52.45/52.69  tff(245,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n12)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[244, 34])).
% 52.45/52.69  tff(246,plain,
% 52.45/52.69      (sum(n20, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[245])).
% 52.45/52.69  tff(247,plain,
% 52.45/52.69      (sum(n20, n12) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(248,plain,
% 52.45/52.69      (n11 = sum(n20, n12)),
% 52.45/52.69      inference(symmetry,[status(thm)],[247])).
% 52.45/52.69  tff(249,plain,
% 52.45/52.69      (sum(n5, n11) = n16),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(250,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n5, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[32, 239])).
% 52.45/52.69  tff(251,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.69      inference(transitivity,[status(thm)],[250, 249])).
% 52.45/52.69  tff(252,plain,
% 52.45/52.69      (sum(n9, n7) = n16),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(253,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n9, n7)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[242, 29])).
% 52.45/52.69  tff(254,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.69      inference(transitivity,[status(thm)],[253, 252])).
% 52.45/52.69  tff(255,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[254, 251])).
% 52.45/52.69  tff(256,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[255, 208, 248, 246])).
% 52.45/52.69  tff(257,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 256])).
% 52.45/52.69  tff(258,plain,((~(Y!0 = n6)) | (~(X!1 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(259,plain,
% 52.45/52.69      (~(Y!0 = n6)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[258, 235])).
% 52.45/52.69  tff(260,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n9)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[244, 21])).
% 52.45/52.69  tff(261,plain,
% 52.45/52.69      (sum(n20, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[260])).
% 52.45/52.69  tff(262,plain,
% 52.45/52.69      (sum(n20, n9) = n8),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(263,plain,
% 52.45/52.69      (n8 = sum(n20, n9)),
% 52.45/52.69      inference(symmetry,[status(thm)],[262])).
% 52.45/52.69  tff(264,plain,
% 52.45/52.69      (sum(n4, n4) = n8),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(265,plain,
% 52.45/52.69      (sum(n14, n11) = n4),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(266,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n14, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[19, 239])).
% 52.45/52.69  tff(267,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.45/52.69      inference(transitivity,[status(thm)],[266, 265])).
% 52.45/52.69  tff(268,plain,
% 52.45/52.69      (sum(n9, n16) = n4),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(269,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n9, n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[242, 16])).
% 52.45/52.69  tff(270,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.45/52.69      inference(transitivity,[status(thm)],[269, 268])).
% 52.45/52.69  tff(271,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[270, 267])).
% 52.45/52.69  tff(272,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[271, 264, 263, 261])).
% 52.45/52.69  tff(273,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 272])).
% 52.45/52.69  tff(274,plain,((~(Y!0 = n15)) | (~(X!1 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(275,plain,
% 52.45/52.69      (~(Y!0 = n15)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[274, 235])).
% 52.45/52.69  tff(276,assumption,(Y!0 = n14), introduced(assumption)).
% 52.45/52.69  tff(277,plain,
% 52.45/52.69      (succ(Y!0) = succ(n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[276])).
% 52.45/52.69  tff(278,plain,
% 52.45/52.69      (succ(Y!0) = n15),
% 52.45/52.69      inference(transitivity,[status(thm)],[277, 11])).
% 52.45/52.69  tff(279,plain,
% 52.45/52.69      (pred(n14) = n13),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(280,plain,
% 52.45/52.69      (pred(Y!0) = pred(n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[276])).
% 52.45/52.69  tff(281,plain,
% 52.45/52.69      (pred(Y!0) = n13),
% 52.45/52.69      inference(transitivity,[status(thm)],[280, 279])).
% 52.45/52.69  tff(282,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = sum(n13, n15)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[281, 278])).
% 52.45/52.69  tff(283,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = n7),
% 52.45/52.69      inference(transitivity,[status(thm)],[282, 10])).
% 52.45/52.69  tff(284,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n7)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[244, 283])).
% 52.45/52.69  tff(285,plain,
% 52.45/52.69      (sum(n20, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[284])).
% 52.45/52.69  tff(286,plain,
% 52.45/52.69      (sum(n20, n7) = n6),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(287,plain,
% 52.45/52.69      (n6 = sum(n20, n7)),
% 52.45/52.69      inference(symmetry,[status(thm)],[286])).
% 52.45/52.69  tff(288,plain,
% 52.45/52.69      (sum(n13, n11) = n3),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(289,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n13, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[281, 239])).
% 52.45/52.69  tff(290,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.69      inference(transitivity,[status(thm)],[289, 288])).
% 52.45/52.69  tff(291,plain,
% 52.45/52.69      (sum(n9, n15) = n3),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(292,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n9, n15)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[242, 278])).
% 52.45/52.69  tff(293,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.69      inference(transitivity,[status(thm)],[292, 291])).
% 52.45/52.69  tff(294,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[293, 290])).
% 52.45/52.69  tff(295,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[294, 224, 287, 285])).
% 52.45/52.69  tff(296,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 295])).
% 52.45/52.69  tff(297,plain,((~(Y!0 = n14)) | (~(X!1 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(298,plain,
% 52.45/52.69      (~(Y!0 = n14)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[297, 235])).
% 52.45/52.69  tff(299,plain,
% 52.45/52.69      (sum(n15, n17) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(300,plain,
% 52.45/52.69      (succ(n16) = n17),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(301,assumption,(Y!0 = n16), introduced(assumption)).
% 52.45/52.69  tff(302,plain,
% 52.45/52.69      (succ(Y!0) = succ(n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[301])).
% 52.45/52.69  tff(303,plain,
% 52.45/52.69      (succ(Y!0) = n17),
% 52.45/52.69      inference(transitivity,[status(thm)],[302, 300])).
% 52.45/52.69  tff(304,plain,
% 52.45/52.69      (pred(n16) = n15),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(305,plain,
% 52.45/52.69      (pred(Y!0) = pred(n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[301])).
% 52.45/52.69  tff(306,plain,
% 52.45/52.69      (pred(Y!0) = n15),
% 52.45/52.69      inference(transitivity,[status(thm)],[305, 304])).
% 52.45/52.69  tff(307,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = sum(n15, n17)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[306, 303])).
% 52.45/52.69  tff(308,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = n11),
% 52.45/52.69      inference(transitivity,[status(thm)],[307, 299])).
% 52.45/52.69  tff(309,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[244, 308])).
% 52.45/52.69  tff(310,plain,
% 52.45/52.69      (sum(n20, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[309])).
% 52.45/52.69  tff(311,plain,
% 52.45/52.69      (sum(n20, n11) = n10),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(312,plain,
% 52.45/52.69      (n10 = sum(n20, n11)),
% 52.45/52.69      inference(symmetry,[status(thm)],[311])).
% 52.45/52.69  tff(313,plain,
% 52.45/52.69      (sum(n5, n5) = n10),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(314,plain,
% 52.45/52.69      (sum(n15, n11) = n5),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(315,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n15, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[306, 239])).
% 52.45/52.69  tff(316,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.45/52.69      inference(transitivity,[status(thm)],[315, 314])).
% 52.45/52.69  tff(317,plain,
% 52.45/52.69      (sum(n9, n17) = n5),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(318,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n9, n17)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[242, 303])).
% 52.45/52.69  tff(319,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.45/52.69      inference(transitivity,[status(thm)],[318, 317])).
% 52.45/52.69  tff(320,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[319, 316])).
% 52.45/52.69  tff(321,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[320, 313, 312, 310])).
% 52.45/52.69  tff(322,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 321])).
% 52.45/52.69  tff(323,plain,((~(X!1 = n10)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(324,plain,
% 52.45/52.69      (~(Y!0 = n16)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[323, 235])).
% 52.45/52.69  tff(325,assumption,(Y!0 = n13), introduced(assumption)).
% 52.45/52.69  tff(326,plain,
% 52.45/52.69      (succ(Y!0) = succ(n13)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[325])).
% 52.45/52.69  tff(327,plain,
% 52.45/52.69      (succ(Y!0) = n14),
% 52.45/52.69      inference(transitivity,[status(thm)],[326, 23])).
% 52.45/52.69  tff(328,plain,
% 52.45/52.69      (pred(n13) = n12),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(329,plain,
% 52.45/52.69      (pred(Y!0) = pred(n13)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[325])).
% 52.45/52.69  tff(330,plain,
% 52.45/52.69      (pred(Y!0) = n12),
% 52.45/52.69      inference(transitivity,[status(thm)],[329, 328])).
% 52.45/52.69  tff(331,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = sum(n12, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[330, 327])).
% 52.45/52.69  tff(332,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = n5),
% 52.45/52.69      inference(transitivity,[status(thm)],[331, 22])).
% 52.45/52.69  tff(333,assumption,(X!1 = n12), introduced(assumption)).
% 52.45/52.69  tff(334,plain,
% 52.45/52.69      (succ(X!1) = succ(n12)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[333])).
% 52.45/52.69  tff(335,plain,
% 52.45/52.69      (succ(X!1) = n13),
% 52.45/52.69      inference(transitivity,[status(thm)],[334, 98])).
% 52.45/52.69  tff(336,plain,
% 52.45/52.69      (pred(n12) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(337,plain,
% 52.45/52.69      (pred(X!1) = pred(n12)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[333])).
% 52.45/52.69  tff(338,plain,
% 52.45/52.69      (pred(X!1) = n11),
% 52.45/52.69      inference(transitivity,[status(thm)],[337, 336])).
% 52.45/52.69  tff(339,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = sum(n11, n13)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[338, 335])).
% 52.45/52.69  tff(340,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = n3),
% 52.45/52.69      inference(transitivity,[status(thm)],[339, 97])).
% 52.45/52.69  tff(341,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[340, 332])).
% 52.45/52.69  tff(342,plain,
% 52.45/52.69      (sum(n3, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[341])).
% 52.45/52.69  tff(343,plain,
% 52.45/52.69      (n8 = sum(n3, n5)),
% 52.45/52.69      inference(symmetry,[status(thm)],[35])).
% 52.45/52.69  tff(344,plain,
% 52.45/52.69      (sum(n12, n13) = n4),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(345,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n12, n13)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[330, 335])).
% 52.45/52.69  tff(346,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.45/52.69      inference(transitivity,[status(thm)],[345, 344])).
% 52.45/52.69  tff(347,plain,
% 52.45/52.69      (sum(n11, n14) = n4),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(348,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n11, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[338, 327])).
% 52.45/52.69  tff(349,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.45/52.69      inference(transitivity,[status(thm)],[348, 347])).
% 52.45/52.69  tff(350,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[349, 346])).
% 52.45/52.69  tff(351,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[350, 264, 343, 342])).
% 52.45/52.69  tff(352,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 351])).
% 52.45/52.69  tff(353,plain,((~(X!1 = n12)) | (~(Y!0 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(354,plain,
% 52.45/52.69      (~(X!1 = n12)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[353, 325])).
% 52.45/52.69  tff(355,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[170, 332])).
% 52.45/52.69  tff(356,plain,
% 52.45/52.69      (sum(n8, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[355])).
% 52.45/52.69  tff(357,plain,
% 52.45/52.69      (n13 = sum(n8, n5)),
% 52.45/52.69      inference(symmetry,[status(thm)],[175])).
% 52.45/52.69  tff(358,plain,
% 52.45/52.69      (sum(n17, n17) = n13),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(359,plain,
% 52.45/52.69      (sum(n12, n5) = n17),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(360,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n12, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[330, 165])).
% 52.45/52.69  tff(361,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.69      inference(transitivity,[status(thm)],[360, 359])).
% 52.45/52.69  tff(362,plain,
% 52.45/52.69      (sum(n3, n14) = n17),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(363,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n3, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[168, 327])).
% 52.45/52.69  tff(364,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.69      inference(transitivity,[status(thm)],[363, 362])).
% 52.45/52.69  tff(365,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[364, 361])).
% 52.45/52.69  tff(366,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[365, 358, 357, 356])).
% 52.45/52.69  tff(367,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 366])).
% 52.45/52.69  tff(368,plain,((~(X!1 = n4)) | (~(Y!0 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(369,plain,
% 52.45/52.69      (~(X!1 = n4)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[368, 325])).
% 52.45/52.69  tff(370,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[187, 332])).
% 52.45/52.69  tff(371,plain,
% 52.45/52.69      (sum(n10, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[370])).
% 52.45/52.69  tff(372,plain,
% 52.45/52.69      (sum(n10, n5) = n15),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(373,plain,
% 52.45/52.69      (n15 = sum(n10, n5)),
% 52.45/52.69      inference(symmetry,[status(thm)],[372])).
% 52.45/52.69  tff(374,plain,
% 52.45/52.69      (sum(n18, n18) = n15),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(375,plain,
% 52.45/52.69      (sum(n12, n6) = n18),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(376,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n12, n6)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[330, 101])).
% 52.45/52.69  tff(377,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.45/52.69      inference(transitivity,[status(thm)],[376, 375])).
% 52.45/52.69  tff(378,plain,
% 52.45/52.69      (sum(n4, n14) = n18),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(379,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n4, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[111, 327])).
% 52.45/52.69  tff(380,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.45/52.69      inference(transitivity,[status(thm)],[379, 378])).
% 52.45/52.69  tff(381,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[380, 377])).
% 52.45/52.69  tff(382,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[381, 374, 373, 371])).
% 52.45/52.69  tff(383,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 382])).
% 52.45/52.69  tff(384,plain,((~(X!1 = n5)) | (~(Y!0 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(385,plain,
% 52.45/52.69      (~(X!1 = n5)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[384, 325])).
% 52.45/52.69  tff(386,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[46, 332])).
% 52.45/52.69  tff(387,plain,
% 52.45/52.69      (sum(n14, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[386])).
% 52.45/52.69  tff(388,plain,
% 52.45/52.69      (sum(n14, n5) = n19),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(389,plain,
% 52.45/52.69      (n19 = sum(n14, n5)),
% 52.45/52.69      inference(symmetry,[status(thm)],[388])).
% 52.45/52.69  tff(390,plain,
% 52.45/52.69      (sum(n12, n8) = n20),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(391,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n12, n8)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[330, 41])).
% 52.45/52.69  tff(392,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.45/52.69      inference(transitivity,[status(thm)],[391, 390])).
% 52.45/52.69  tff(393,plain,
% 52.45/52.69      (sum(n6, n14) = n20),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(394,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n6, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[44, 327])).
% 52.45/52.69  tff(395,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.45/52.69      inference(transitivity,[status(thm)],[394, 393])).
% 52.45/52.69  tff(396,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[395, 392])).
% 52.45/52.69  tff(397,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[396, 139, 389, 387])).
% 52.45/52.69  tff(398,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 397])).
% 52.45/52.69  tff(399,plain,((~(X!1 = n7)) | (~(Y!0 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(400,plain,
% 52.45/52.69      (~(X!1 = n7)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[399, 325])).
% 52.45/52.69  tff(401,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n5)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[70, 332])).
% 52.45/52.69  tff(402,plain,
% 52.45/52.69      (sum(n9, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[401])).
% 52.45/52.69  tff(403,plain,
% 52.45/52.69      (sum(n9, n5) = n14),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(404,plain,
% 52.45/52.69      (n14 = sum(n9, n5)),
% 52.45/52.69      inference(symmetry,[status(thm)],[403])).
% 52.45/52.69  tff(405,plain,
% 52.45/52.69      (sum(n7, n7) = n14),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(406,plain,
% 52.45/52.69      (sum(n12, n16) = n7),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(407,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n12, n16)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[330, 66])).
% 52.45/52.69  tff(408,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.69      inference(transitivity,[status(thm)],[407, 406])).
% 52.45/52.69  tff(409,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n14, n14)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[68, 327])).
% 52.45/52.69  tff(410,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.69      inference(transitivity,[status(thm)],[409, 192])).
% 52.45/52.69  tff(411,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[410, 408])).
% 52.45/52.69  tff(412,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[411, 405, 404, 402])).
% 52.45/52.69  tff(413,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 412])).
% 52.45/52.69  tff(414,plain,((~(X!1 = n15)) | (~(Y!0 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(415,plain,
% 52.45/52.69      (~(X!1 = n15)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[414, 325])).
% 52.45/52.69  tff(416,plain,
% 52.45/52.69      (sum(n20, n1) = n0),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(417,plain,
% 52.45/52.69      (succ(n0) = n1),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(418,assumption,(Y!0 = n0), introduced(assumption)).
% 52.45/52.69  tff(419,plain,
% 52.45/52.69      (succ(Y!0) = succ(n0)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[418])).
% 52.45/52.69  tff(420,plain,
% 52.45/52.69      (succ(Y!0) = n1),
% 52.45/52.69      inference(transitivity,[status(thm)],[419, 417])).
% 52.45/52.69  tff(421,plain,
% 52.45/52.69      (pred(n0) = n20),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(422,plain,
% 52.45/52.69      (pred(Y!0) = pred(n0)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[418])).
% 52.45/52.69  tff(423,plain,
% 52.45/52.69      (pred(Y!0) = n20),
% 52.45/52.69      inference(transitivity,[status(thm)],[422, 421])).
% 52.45/52.69  tff(424,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = sum(n20, n1)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[423, 420])).
% 52.45/52.69  tff(425,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(Y!0)) = n0),
% 52.45/52.69      inference(transitivity,[status(thm)],[424, 416])).
% 52.45/52.69  tff(426,assumption,(X!1 = n11), introduced(assumption)).
% 52.45/52.69  tff(427,plain,
% 52.45/52.69      (succ(X!1) = succ(n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[426])).
% 52.45/52.69  tff(428,plain,
% 52.45/52.69      (succ(X!1) = n12),
% 52.45/52.69      inference(transitivity,[status(thm)],[427, 162])).
% 52.45/52.69  tff(429,plain,
% 52.45/52.69      (pred(n11) = n10),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(430,plain,
% 52.45/52.69      (pred(X!1) = pred(n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[426])).
% 52.45/52.69  tff(431,plain,
% 52.45/52.69      (pred(X!1) = n10),
% 52.45/52.69      inference(transitivity,[status(thm)],[430, 429])).
% 52.45/52.69  tff(432,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = sum(n10, n12)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[431, 428])).
% 52.45/52.69  tff(433,plain,
% 52.45/52.69      (sum(pred(X!1), succ(X!1)) = n1),
% 52.45/52.69      inference(transitivity,[status(thm)],[432, 161])).
% 52.45/52.69  tff(434,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n0)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[433, 425])).
% 52.45/52.69  tff(435,plain,
% 52.45/52.69      (sum(n1, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[434])).
% 52.45/52.69  tff(436,plain,
% 52.45/52.69      (sum(n1, n0) = n1),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(437,plain,
% 52.45/52.69      (n1 = sum(n1, n0)),
% 52.45/52.69      inference(symmetry,[status(thm)],[436])).
% 52.45/52.69  tff(438,plain,
% 52.45/52.69      (sum(n11, n11) = n1),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(439,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n20, n12)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[423, 428])).
% 52.45/52.69  tff(440,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.69      inference(transitivity,[status(thm)],[439, 247])).
% 52.45/52.69  tff(441,plain,
% 52.45/52.69      (sum(n10, n1) = n11),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(442,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n10, n1)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[431, 420])).
% 52.45/52.69  tff(443,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.69      inference(transitivity,[status(thm)],[442, 441])).
% 52.45/52.69  tff(444,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[443, 440])).
% 52.45/52.69  tff(445,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[444, 438, 437, 435])).
% 52.45/52.69  tff(446,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 445])).
% 52.45/52.69  tff(447,plain,((~(X!1 = n11)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(448,plain,
% 52.45/52.69      (~(X!1 = n11)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[447, 418])).
% 52.45/52.69  tff(449,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n0)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[340, 425])).
% 52.45/52.69  tff(450,plain,
% 52.45/52.69      (sum(n3, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(symmetry,[status(thm)],[449])).
% 52.45/52.69  tff(451,plain,
% 52.45/52.69      (sum(n3, n0) = n3),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(452,plain,
% 52.45/52.69      (n3 = sum(n3, n0)),
% 52.45/52.69      inference(symmetry,[status(thm)],[451])).
% 52.45/52.69  tff(453,plain,
% 52.45/52.69      (sum(n20, n13) = n12),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(454,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = sum(n20, n13)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[423, 335])).
% 52.45/52.69  tff(455,plain,
% 52.45/52.69      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.69      inference(transitivity,[status(thm)],[454, 453])).
% 52.45/52.69  tff(456,plain,
% 52.45/52.69      (sum(n11, n1) = n12),
% 52.45/52.69      inference(and_elim,[status(thm)],[9])).
% 52.45/52.69  tff(457,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = sum(n11, n1)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[338, 420])).
% 52.45/52.69  tff(458,plain,
% 52.45/52.69      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.69      inference(transitivity,[status(thm)],[457, 456])).
% 52.45/52.69  tff(459,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[458, 455])).
% 52.45/52.69  tff(460,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.69      inference(transitivity,[status(thm)],[459, 123, 452, 450])).
% 52.45/52.69  tff(461,plain,
% 52.45/52.69      ($false),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[60, 460])).
% 52.45/52.69  tff(462,plain,((~(X!1 = n12)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.69  tff(463,plain,
% 52.45/52.69      (~(X!1 = n12)),
% 52.45/52.69      inference(unit_resolution,[status(thm)],[462, 418])).
% 52.45/52.69  tff(464,plain,
% 52.45/52.69      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n0)),
% 52.45/52.69      inference(monotonicity,[status(thm)],[170, 425])).
% 52.45/52.69  tff(465,plain,
% 52.45/52.69      (sum(n8, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[464])).
% 52.45/52.70  tff(466,plain,
% 52.45/52.70      (sum(n8, n0) = n8),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(467,plain,
% 52.45/52.70      (n8 = sum(n8, n0)),
% 52.45/52.70      inference(symmetry,[status(thm)],[466])).
% 52.45/52.70  tff(468,plain,
% 52.45/52.70      (sum(n20, n5) = n4),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(469,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n20, n5)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[423, 165])).
% 52.45/52.70  tff(470,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.45/52.70      inference(transitivity,[status(thm)],[469, 468])).
% 52.45/52.70  tff(471,plain,
% 52.45/52.70      (sum(n3, n1) = n4),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(472,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n3, n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[168, 420])).
% 52.45/52.70  tff(473,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.45/52.70      inference(transitivity,[status(thm)],[472, 471])).
% 52.45/52.70  tff(474,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[473, 470])).
% 52.45/52.70  tff(475,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[474, 264, 467, 465])).
% 52.45/52.70  tff(476,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 475])).
% 52.45/52.70  tff(477,plain,((~(X!1 = n4)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(478,plain,
% 52.45/52.70      (~(X!1 = n4)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[477, 418])).
% 52.45/52.70  tff(479,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n0)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[187, 425])).
% 52.45/52.70  tff(480,plain,
% 52.45/52.70      (sum(n10, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[479])).
% 52.45/52.70  tff(481,plain,
% 52.45/52.70      (sum(n10, n0) = n10),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(482,plain,
% 52.45/52.70      (n10 = sum(n10, n0)),
% 52.45/52.70      inference(symmetry,[status(thm)],[481])).
% 52.45/52.70  tff(483,plain,
% 52.45/52.70      (sum(n20, n6) = n5),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(484,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n20, n6)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[423, 101])).
% 52.45/52.70  tff(485,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.45/52.70      inference(transitivity,[status(thm)],[484, 483])).
% 52.45/52.70  tff(486,plain,
% 52.45/52.70      (sum(n4, n1) = n5),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(487,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n4, n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[111, 420])).
% 52.45/52.70  tff(488,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.45/52.70      inference(transitivity,[status(thm)],[487, 486])).
% 52.45/52.70  tff(489,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[488, 485])).
% 52.45/52.70  tff(490,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[489, 313, 482, 480])).
% 52.45/52.70  tff(491,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 490])).
% 52.45/52.70  tff(492,plain,((~(X!1 = n5)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(493,plain,
% 52.45/52.70      (~(X!1 = n5)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[492, 418])).
% 52.45/52.70  tff(494,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n0)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[46, 425])).
% 52.45/52.70  tff(495,plain,
% 52.45/52.70      (sum(n14, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[494])).
% 52.45/52.70  tff(496,plain,
% 52.45/52.70      (sum(n14, n0) = n14),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(497,plain,
% 52.45/52.70      (n14 = sum(n14, n0)),
% 52.45/52.70      inference(symmetry,[status(thm)],[496])).
% 52.45/52.70  tff(498,plain,
% 52.45/52.70      (sum(n20, n8) = n7),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(499,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n20, n8)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[423, 41])).
% 52.45/52.70  tff(500,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.70      inference(transitivity,[status(thm)],[499, 498])).
% 52.45/52.70  tff(501,plain,
% 52.45/52.70      (sum(n6, n1) = n7),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(502,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n6, n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[44, 420])).
% 52.45/52.70  tff(503,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.70      inference(transitivity,[status(thm)],[502, 501])).
% 52.45/52.70  tff(504,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[503, 500])).
% 52.45/52.70  tff(505,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[504, 405, 497, 495])).
% 52.45/52.70  tff(506,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 505])).
% 52.45/52.70  tff(507,plain,((~(X!1 = n7)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(508,plain,
% 52.45/52.70      (~(X!1 = n7)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[507, 418])).
% 52.45/52.70  tff(509,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n0)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[70, 425])).
% 52.45/52.70  tff(510,plain,
% 52.45/52.70      (sum(n9, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[509])).
% 52.45/52.70  tff(511,plain,
% 52.45/52.70      (sum(n9, n0) = n9),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(512,plain,
% 52.45/52.70      (n9 = sum(n9, n0)),
% 52.45/52.70      inference(symmetry,[status(thm)],[511])).
% 52.45/52.70  tff(513,plain,
% 52.45/52.70      (sum(n15, n15) = n9),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(514,plain,
% 52.45/52.70      (sum(n20, n16) = n15),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(515,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n20, n16)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[423, 66])).
% 52.45/52.70  tff(516,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.70      inference(transitivity,[status(thm)],[515, 514])).
% 52.45/52.70  tff(517,plain,
% 52.45/52.70      (sum(n14, n1) = n15),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(518,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n14, n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[68, 420])).
% 52.45/52.70  tff(519,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.70      inference(transitivity,[status(thm)],[518, 517])).
% 52.45/52.70  tff(520,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[519, 516])).
% 52.45/52.70  tff(521,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[520, 513, 512, 510])).
% 52.45/52.70  tff(522,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 521])).
% 52.45/52.70  tff(523,plain,((~(X!1 = n15)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(524,plain,
% 52.45/52.70      (~(X!1 = n15)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[523, 418])).
% 52.45/52.70  tff(525,assumption,(X!1 = n8), introduced(assumption)).
% 52.45/52.70  tff(526,plain,
% 52.45/52.70      (sum(n7, n9) = n16),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(527,plain,
% 52.45/52.70      (succ(n8) = n9),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(528,plain,
% 52.45/52.70      (succ(X!1) = succ(n8)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[525])).
% 52.45/52.70  tff(529,plain,
% 52.45/52.70      (succ(X!1) = n9),
% 52.45/52.70      inference(transitivity,[status(thm)],[528, 527])).
% 52.45/52.70  tff(530,plain,
% 52.45/52.70      (pred(n8) = n7),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(531,plain,
% 52.45/52.70      (pred(X!1) = pred(n8)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[525])).
% 52.45/52.70  tff(532,plain,
% 52.45/52.70      (pred(X!1) = n7),
% 52.45/52.70      inference(transitivity,[status(thm)],[531, 530])).
% 52.45/52.70  tff(533,plain,
% 52.45/52.70      (sum(pred(X!1), succ(X!1)) = sum(n7, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 529])).
% 52.45/52.70  tff(534,plain,
% 52.45/52.70      (sum(pred(X!1), succ(X!1)) = n16),
% 52.45/52.70      inference(transitivity,[status(thm)],[533, 526])).
% 52.45/52.70  tff(535,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n18)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[534, 160])).
% 52.45/52.70  tff(536,plain,
% 52.45/52.70      (sum(n16, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[535])).
% 52.45/52.70  tff(537,plain,
% 52.45/52.70      (sum(n16, n18) = n13),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(538,plain,
% 52.45/52.70      (n13 = sum(n16, n18)),
% 52.45/52.70      inference(symmetry,[status(thm)],[537])).
% 52.45/52.70  tff(539,plain,
% 52.45/52.70      (sum(n8, n9) = n17),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(540,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n8, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[158, 529])).
% 52.45/52.70  tff(541,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.70      inference(transitivity,[status(thm)],[540, 539])).
% 52.45/52.70  tff(542,plain,
% 52.45/52.70      (sum(n7, n10) = n17),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(543,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n7, n10)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 155])).
% 52.45/52.70  tff(544,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.70      inference(transitivity,[status(thm)],[543, 542])).
% 52.45/52.70  tff(545,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[544, 541])).
% 52.45/52.70  tff(546,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[545, 358, 538, 536])).
% 52.45/52.70  tff(547,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 546])).
% 52.45/52.70  tff(548,plain,((~(Y!0 = n9)) | (~(X!1 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(549,plain,
% 52.45/52.70      (~(Y!0 = n9)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[548, 525])).
% 52.45/52.70  tff(550,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n10)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[534, 96])).
% 52.45/52.70  tff(551,plain,
% 52.45/52.70      (sum(n16, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[550])).
% 52.45/52.70  tff(552,plain,
% 52.45/52.70      (sum(n16, n10) = n5),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(553,plain,
% 52.45/52.70      (n5 = sum(n16, n10)),
% 52.45/52.70      inference(symmetry,[status(thm)],[552])).
% 52.45/52.70  tff(554,plain,
% 52.45/52.70      (sum(n4, n9) = n13),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(555,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n4, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[94, 529])).
% 52.45/52.70  tff(556,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.70      inference(transitivity,[status(thm)],[555, 554])).
% 52.45/52.70  tff(557,plain,
% 52.45/52.70      (sum(n7, n6) = n13),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(558,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n7, n6)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 91])).
% 52.45/52.70  tff(559,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.70      inference(transitivity,[status(thm)],[558, 557])).
% 52.45/52.70  tff(560,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[559, 556])).
% 52.45/52.70  tff(561,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[560, 51, 553, 551])).
% 52.45/52.70  tff(562,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 561])).
% 52.45/52.70  tff(563,plain,((~(Y!0 = n5)) | (~(X!1 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(564,plain,
% 52.45/52.70      (~(Y!0 = n5)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[563, 525])).
% 52.45/52.70  tff(565,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n12)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[534, 34])).
% 52.45/52.70  tff(566,plain,
% 52.45/52.70      (sum(n16, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[565])).
% 52.45/52.70  tff(567,plain,
% 52.45/52.70      (sum(n16, n12) = n7),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(568,plain,
% 52.45/52.70      (n7 = sum(n16, n12)),
% 52.45/52.70      inference(symmetry,[status(thm)],[567])).
% 52.45/52.70  tff(569,plain,
% 52.45/52.70      (sum(n5, n9) = n14),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(570,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n5, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[32, 529])).
% 52.45/52.70  tff(571,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.45/52.70      inference(transitivity,[status(thm)],[570, 569])).
% 52.45/52.70  tff(572,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n7, n7)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 29])).
% 52.45/52.70  tff(573,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.45/52.70      inference(transitivity,[status(thm)],[572, 405])).
% 52.45/52.70  tff(574,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[573, 571])).
% 52.45/52.70  tff(575,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[574, 192, 568, 566])).
% 52.45/52.70  tff(576,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 575])).
% 52.45/52.70  tff(577,plain,((~(Y!0 = n6)) | (~(X!1 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(578,plain,
% 52.45/52.70      (~(Y!0 = n6)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[577, 525])).
% 52.45/52.70  tff(579,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[534, 21])).
% 52.45/52.70  tff(580,plain,
% 52.45/52.70      (sum(n16, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[579])).
% 52.45/52.70  tff(581,plain,
% 52.45/52.70      (sum(n16, n9) = n4),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(582,plain,
% 52.45/52.70      (n4 = sum(n16, n9)),
% 52.45/52.70      inference(symmetry,[status(thm)],[581])).
% 52.45/52.70  tff(583,plain,
% 52.45/52.70      (sum(n2, n2) = n4),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(584,plain,
% 52.45/52.70      (sum(n14, n9) = n2),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(585,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n14, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[19, 529])).
% 52.45/52.70  tff(586,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.45/52.70      inference(transitivity,[status(thm)],[585, 584])).
% 52.45/52.70  tff(587,plain,
% 52.45/52.70      (sum(n7, n16) = n2),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(588,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n7, n16)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 16])).
% 52.45/52.70  tff(589,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.45/52.70      inference(transitivity,[status(thm)],[588, 587])).
% 52.45/52.70  tff(590,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[589, 586])).
% 52.45/52.70  tff(591,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[590, 583, 582, 580])).
% 52.45/52.70  tff(592,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 591])).
% 52.45/52.70  tff(593,plain,((~(Y!0 = n15)) | (~(X!1 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(594,plain,
% 52.45/52.70      (~(Y!0 = n15)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[593, 525])).
% 52.45/52.70  tff(595,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n7)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[534, 283])).
% 52.45/52.70  tff(596,plain,
% 52.45/52.70      (sum(n16, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[595])).
% 52.45/52.70  tff(597,plain,
% 52.45/52.70      (sum(n16, n7) = n2),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(598,plain,
% 52.45/52.70      (n2 = sum(n16, n7)),
% 52.45/52.70      inference(symmetry,[status(thm)],[597])).
% 52.45/52.70  tff(599,plain,
% 52.45/52.70      (sum(n1, n1) = n2),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(600,plain,
% 52.45/52.70      (sum(n13, n9) = n1),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(601,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n13, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[281, 529])).
% 52.45/52.70  tff(602,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.45/52.70      inference(transitivity,[status(thm)],[601, 600])).
% 52.45/52.70  tff(603,plain,
% 52.45/52.70      (sum(n7, n15) = n1),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(604,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n7, n15)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 278])).
% 52.45/52.70  tff(605,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.45/52.70      inference(transitivity,[status(thm)],[604, 603])).
% 52.45/52.70  tff(606,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[605, 602])).
% 52.45/52.70  tff(607,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[606, 599, 598, 596])).
% 52.45/52.70  tff(608,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 607])).
% 52.45/52.70  tff(609,plain,((~(Y!0 = n14)) | (~(X!1 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(610,plain,
% 52.45/52.70      (~(Y!0 = n14)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[609, 525])).
% 52.45/52.70  tff(611,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n11)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[534, 308])).
% 52.45/52.70  tff(612,plain,
% 52.45/52.70      (sum(n16, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[611])).
% 52.45/52.70  tff(613,plain,
% 52.45/52.70      (sum(n16, n11) = n6),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(614,plain,
% 52.45/52.70      (n6 = sum(n16, n11)),
% 52.45/52.70      inference(symmetry,[status(thm)],[613])).
% 52.45/52.70  tff(615,plain,
% 52.45/52.70      (sum(n15, n9) = n3),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(616,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n15, n9)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[306, 529])).
% 52.45/52.70  tff(617,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.70      inference(transitivity,[status(thm)],[616, 615])).
% 52.45/52.70  tff(618,plain,
% 52.45/52.70      (sum(n7, n17) = n3),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(619,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n7, n17)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[532, 303])).
% 52.45/52.70  tff(620,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.70      inference(transitivity,[status(thm)],[619, 618])).
% 52.45/52.70  tff(621,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[620, 617])).
% 52.45/52.70  tff(622,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[621, 224, 614, 612])).
% 52.45/52.70  tff(623,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 622])).
% 52.45/52.70  tff(624,plain,((~(X!1 = n8)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(625,plain,
% 52.45/52.70      (~(Y!0 = n16)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[624, 525])).
% 52.45/52.70  tff(626,plain,
% 52.45/52.70      (sum(n0, n2) = n2),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(627,plain,
% 52.45/52.70      (succ(n1) = n2),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(628,assumption,(Y!0 = n1), introduced(assumption)).
% 52.45/52.70  tff(629,plain,
% 52.45/52.70      (succ(Y!0) = succ(n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[628])).
% 52.45/52.70  tff(630,plain,
% 52.45/52.70      (succ(Y!0) = n2),
% 52.45/52.70      inference(transitivity,[status(thm)],[629, 627])).
% 52.45/52.70  tff(631,plain,
% 52.45/52.70      (pred(n1) = n0),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(632,plain,
% 52.45/52.70      (pred(Y!0) = pred(n1)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[628])).
% 52.45/52.70  tff(633,plain,
% 52.45/52.70      (pred(Y!0) = n0),
% 52.45/52.70      inference(transitivity,[status(thm)],[632, 631])).
% 52.45/52.70  tff(634,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(Y!0)) = sum(n0, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 630])).
% 52.45/52.70  tff(635,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(Y!0)) = n2),
% 52.45/52.70      inference(transitivity,[status(thm)],[634, 626])).
% 52.45/52.70  tff(636,assumption,(X!1 = n16), introduced(assumption)).
% 52.45/52.70  tff(637,plain,
% 52.45/52.70      (succ(X!1) = succ(n16)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[636])).
% 52.45/52.70  tff(638,plain,
% 52.45/52.70      (succ(X!1) = n17),
% 52.45/52.70      inference(transitivity,[status(thm)],[637, 300])).
% 52.45/52.70  tff(639,plain,
% 52.45/52.70      (pred(X!1) = pred(n16)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[636])).
% 52.45/52.70  tff(640,plain,
% 52.45/52.70      (pred(X!1) = n15),
% 52.45/52.70      inference(transitivity,[status(thm)],[639, 304])).
% 52.45/52.70  tff(641,plain,
% 52.45/52.70      (sum(pred(X!1), succ(X!1)) = sum(n15, n17)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[640, 638])).
% 52.45/52.70  tff(642,plain,
% 52.45/52.70      (sum(pred(X!1), succ(X!1)) = n11),
% 52.45/52.70      inference(transitivity,[status(thm)],[641, 299])).
% 52.45/52.70  tff(643,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[642, 635])).
% 52.45/52.70  tff(644,plain,
% 52.45/52.70      (sum(n11, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[643])).
% 52.45/52.70  tff(645,plain,
% 52.45/52.70      (sum(n11, n2) = n13),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(646,plain,
% 52.45/52.70      (n13 = sum(n11, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[645])).
% 52.45/52.70  tff(647,plain,
% 52.45/52.70      (sum(n0, n17) = n17),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(648,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n17)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 638])).
% 52.45/52.70  tff(649,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.70      inference(transitivity,[status(thm)],[648, 647])).
% 52.45/52.70  tff(650,plain,
% 52.45/52.70      (sum(n15, n2) = n17),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(651,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n15, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[640, 630])).
% 52.45/52.70  tff(652,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.70      inference(transitivity,[status(thm)],[651, 650])).
% 52.45/52.70  tff(653,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[652, 649])).
% 52.45/52.70  tff(654,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[653, 358, 646, 644])).
% 52.45/52.70  tff(655,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 654])).
% 52.45/52.70  tff(656,plain,((~(Y!0 = n1)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(657,plain,
% 52.45/52.70      (~(X!1 = n16)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[656, 628])).
% 52.45/52.70  tff(658,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[244, 635])).
% 52.45/52.70  tff(659,plain,
% 52.45/52.70      (sum(n20, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[658])).
% 52.45/52.70  tff(660,plain,
% 52.45/52.70      (sum(n20, n2) = n1),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(661,plain,
% 52.45/52.70      (n1 = sum(n20, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[660])).
% 52.45/52.70  tff(662,plain,
% 52.45/52.70      (sum(n0, n11) = n11),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(663,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n11)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 239])).
% 52.45/52.70  tff(664,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.70      inference(transitivity,[status(thm)],[663, 662])).
% 52.45/52.70  tff(665,plain,
% 52.45/52.70      (sum(n9, n2) = n11),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(666,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n9, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[242, 630])).
% 52.45/52.70  tff(667,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.70      inference(transitivity,[status(thm)],[666, 665])).
% 52.45/52.70  tff(668,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[667, 664])).
% 52.45/52.70  tff(669,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[668, 438, 661, 659])).
% 52.45/52.70  tff(670,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 669])).
% 52.45/52.70  tff(671,plain,((~(X!1 = n10)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(672,plain,
% 52.45/52.70      (~(X!1 = n10)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[671, 628])).
% 52.45/52.70  tff(673,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[433, 635])).
% 52.45/52.70  tff(674,plain,
% 52.45/52.70      (sum(n1, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[673])).
% 52.45/52.70  tff(675,plain,
% 52.45/52.70      (sum(n1, n2) = n3),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(676,plain,
% 52.45/52.70      (n3 = sum(n1, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[675])).
% 52.45/52.70  tff(677,plain,
% 52.45/52.70      (sum(n0, n12) = n12),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(678,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n12)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 428])).
% 52.45/52.70  tff(679,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.70      inference(transitivity,[status(thm)],[678, 677])).
% 52.45/52.70  tff(680,plain,
% 52.45/52.70      (sum(n10, n2) = n12),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(681,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n10, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[431, 630])).
% 52.45/52.70  tff(682,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.70      inference(transitivity,[status(thm)],[681, 680])).
% 52.45/52.70  tff(683,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[682, 679])).
% 52.45/52.70  tff(684,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[683, 123, 676, 674])).
% 52.45/52.70  tff(685,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 684])).
% 52.45/52.70  tff(686,plain,((~(X!1 = n11)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(687,plain,
% 52.45/52.70      (~(X!1 = n11)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[686, 628])).
% 52.45/52.70  tff(688,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[340, 635])).
% 52.45/52.70  tff(689,plain,
% 52.45/52.70      (sum(n3, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[688])).
% 52.45/52.70  tff(690,plain,
% 52.45/52.70      (sum(n3, n2) = n5),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(691,plain,
% 52.45/52.70      (n5 = sum(n3, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[690])).
% 52.45/52.70  tff(692,plain,
% 52.45/52.70      (sum(n0, n13) = n13),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(693,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n13)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 335])).
% 52.45/52.70  tff(694,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.70      inference(transitivity,[status(thm)],[693, 692])).
% 52.45/52.70  tff(695,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n11, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[338, 630])).
% 52.45/52.70  tff(696,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.70      inference(transitivity,[status(thm)],[695, 645])).
% 52.45/52.70  tff(697,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[696, 694])).
% 52.45/52.70  tff(698,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[697, 51, 691, 689])).
% 52.45/52.70  tff(699,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 698])).
% 52.45/52.70  tff(700,plain,((~(X!1 = n12)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(701,plain,
% 52.45/52.70      (~(X!1 = n12)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[700, 628])).
% 52.45/52.70  tff(702,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[170, 635])).
% 52.45/52.70  tff(703,plain,
% 52.45/52.70      (sum(n8, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[702])).
% 52.45/52.70  tff(704,plain,
% 52.45/52.70      (sum(n8, n2) = n10),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(705,plain,
% 52.45/52.70      (n10 = sum(n8, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[704])).
% 52.45/52.70  tff(706,plain,
% 52.45/52.70      (sum(n0, n5) = n5),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(707,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n5)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 165])).
% 52.45/52.70  tff(708,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.45/52.70      inference(transitivity,[status(thm)],[707, 706])).
% 52.45/52.70  tff(709,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n3, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[168, 630])).
% 52.45/52.70  tff(710,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.45/52.70      inference(transitivity,[status(thm)],[709, 690])).
% 52.45/52.70  tff(711,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[710, 708])).
% 52.45/52.70  tff(712,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[711, 313, 705, 703])).
% 52.45/52.70  tff(713,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 712])).
% 52.45/52.70  tff(714,plain,((~(X!1 = n4)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(715,plain,
% 52.45/52.70      (~(X!1 = n4)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[714, 628])).
% 52.45/52.70  tff(716,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[187, 635])).
% 52.45/52.70  tff(717,plain,
% 52.45/52.70      (sum(n10, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[716])).
% 52.45/52.70  tff(718,plain,
% 52.45/52.70      (n12 = sum(n10, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[680])).
% 52.45/52.70  tff(719,plain,
% 52.45/52.70      (sum(n0, n6) = n6),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(720,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n6)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 101])).
% 52.45/52.70  tff(721,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.45/52.70      inference(transitivity,[status(thm)],[720, 719])).
% 52.45/52.70  tff(722,plain,
% 52.45/52.70      (sum(n4, n2) = n6),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(723,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n4, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[111, 630])).
% 52.45/52.70  tff(724,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.45/52.70      inference(transitivity,[status(thm)],[723, 722])).
% 52.45/52.70  tff(725,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[724, 721])).
% 52.45/52.70  tff(726,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[725, 127, 718, 717])).
% 52.45/52.70  tff(727,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 726])).
% 52.45/52.70  tff(728,plain,((~(X!1 = n5)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(729,plain,
% 52.45/52.70      (~(X!1 = n5)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[728, 628])).
% 52.45/52.70  tff(730,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[46, 635])).
% 52.45/52.70  tff(731,plain,
% 52.45/52.70      (sum(n14, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[730])).
% 52.45/52.70  tff(732,plain,
% 52.45/52.70      (sum(n14, n2) = n16),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(733,plain,
% 52.45/52.70      (n16 = sum(n14, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[732])).
% 52.45/52.70  tff(734,plain,
% 52.45/52.70      (sum(n0, n8) = n8),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(735,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n8)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 41])).
% 52.45/52.70  tff(736,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.45/52.70      inference(transitivity,[status(thm)],[735, 734])).
% 52.45/52.70  tff(737,plain,
% 52.45/52.70      (sum(n6, n2) = n8),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(738,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n6, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[44, 630])).
% 52.45/52.70  tff(739,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.45/52.70      inference(transitivity,[status(thm)],[738, 737])).
% 52.45/52.70  tff(740,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[739, 736])).
% 52.45/52.70  tff(741,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[740, 209, 733, 731])).
% 52.45/52.70  tff(742,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 741])).
% 52.45/52.70  tff(743,plain,((~(X!1 = n7)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(744,plain,
% 52.45/52.70      (~(X!1 = n7)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[743, 628])).
% 52.45/52.70  tff(745,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[70, 635])).
% 52.45/52.70  tff(746,plain,
% 52.45/52.70      (sum(n9, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(symmetry,[status(thm)],[745])).
% 52.45/52.70  tff(747,plain,
% 52.45/52.70      (n11 = sum(n9, n2)),
% 52.45/52.70      inference(symmetry,[status(thm)],[665])).
% 52.45/52.70  tff(748,plain,
% 52.45/52.70      (sum(n0, n16) = n16),
% 52.45/52.70      inference(and_elim,[status(thm)],[9])).
% 52.45/52.70  tff(749,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = sum(n0, n16)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[633, 66])).
% 52.45/52.70  tff(750,plain,
% 52.45/52.70      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.70      inference(transitivity,[status(thm)],[749, 748])).
% 52.45/52.70  tff(751,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = sum(n14, n2)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[68, 630])).
% 52.45/52.70  tff(752,plain,
% 52.45/52.70      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.70      inference(transitivity,[status(thm)],[751, 732])).
% 52.45/52.70  tff(753,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[752, 750])).
% 52.45/52.70  tff(754,plain,
% 52.45/52.70      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.70      inference(transitivity,[status(thm)],[753, 208, 747, 746])).
% 52.45/52.70  tff(755,plain,
% 52.45/52.70      ($false),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[60, 754])).
% 52.45/52.70  tff(756,plain,((~(X!1 = n15)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.70  tff(757,plain,
% 52.45/52.70      (~(X!1 = n15)),
% 52.45/52.70      inference(unit_resolution,[status(thm)],[756, 628])).
% 52.45/52.70  tff(758,plain,
% 52.45/52.70      ((Y!0 = n18) <=> (n1 = n18)),
% 52.45/52.70      inference(monotonicity,[status(thm)],[628])).
% 52.45/52.70  tff(759,plain,
% 52.45/52.70      ((n1 = n18) <=> (Y!0 = n18)),
% 52.45/52.71      inference(symmetry,[status(thm)],[758])).
% 52.45/52.71  tff(760,plain,
% 52.45/52.71      ((~(n1 = n18)) <=> (~(Y!0 = n18))),
% 52.45/52.71      inference(monotonicity,[status(thm)],[759])).
% 52.45/52.71  tff(761,plain,
% 52.45/52.71      (~(n1 = n18)),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(762,plain,
% 52.45/52.71      (~(Y!0 = n18)),
% 52.45/52.71      inference(modus_ponens,[status(thm)],[761, 760])).
% 52.45/52.71  tff(763,plain,
% 52.45/52.71      (sum(n17, n19) = n15),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(764,plain,
% 52.45/52.71      (succ(n18) = n19),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(765,assumption,(X!1 = n18), introduced(assumption)).
% 52.45/52.71  tff(766,plain,
% 52.45/52.71      (succ(X!1) = succ(n18)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[765])).
% 52.45/52.71  tff(767,plain,
% 52.45/52.71      (succ(X!1) = n19),
% 52.45/52.71      inference(transitivity,[status(thm)],[766, 764])).
% 52.45/52.71  tff(768,plain,
% 52.45/52.71      (pred(n18) = n17),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(769,plain,
% 52.45/52.71      (pred(X!1) = pred(n18)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[765])).
% 52.45/52.71  tff(770,plain,
% 52.45/52.71      (pred(X!1) = n17),
% 52.45/52.71      inference(transitivity,[status(thm)],[769, 768])).
% 52.45/52.71  tff(771,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = sum(n17, n19)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[770, 767])).
% 52.45/52.71  tff(772,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = n15),
% 52.45/52.71      inference(transitivity,[status(thm)],[771, 763])).
% 52.45/52.71  tff(773,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n2)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[772, 635])).
% 52.45/52.71  tff(774,plain,
% 52.45/52.71      (sum(n15, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[773])).
% 52.45/52.71  tff(775,plain,
% 52.45/52.71      (n17 = sum(n15, n2)),
% 52.45/52.71      inference(symmetry,[status(thm)],[650])).
% 52.45/52.71  tff(776,plain,
% 52.45/52.71      (sum(n19, n19) = n17),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(777,plain,
% 52.45/52.71      (sum(n0, n19) = n19),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(778,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n0, n19)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[633, 767])).
% 52.45/52.71  tff(779,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.71      inference(transitivity,[status(thm)],[778, 777])).
% 52.45/52.71  tff(780,plain,
% 52.45/52.71      (sum(n17, n2) = n19),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(781,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n17, n2)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[770, 630])).
% 52.45/52.71  tff(782,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.71      inference(transitivity,[status(thm)],[781, 780])).
% 52.45/52.71  tff(783,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[782, 779])).
% 52.45/52.71  tff(784,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[783, 776, 775, 774])).
% 52.45/52.71  tff(785,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 784])).
% 52.45/52.71  tff(786,plain,((~(Y!0 = n1)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(787,plain,
% 52.45/52.71      (~(X!1 = n18)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[786, 628])).
% 52.45/52.71  tff(788,plain,
% 52.45/52.71      (sum(n1, n3) = n4),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(789,plain,
% 52.45/52.71      (succ(n2) = n3),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(790,assumption,(Y!0 = n2), introduced(assumption)).
% 52.45/52.71  tff(791,plain,
% 52.45/52.71      (succ(Y!0) = succ(n2)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[790])).
% 52.45/52.71  tff(792,plain,
% 52.45/52.71      (succ(Y!0) = n3),
% 52.45/52.71      inference(transitivity,[status(thm)],[791, 789])).
% 52.45/52.71  tff(793,plain,
% 52.45/52.71      (pred(n2) = n1),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(794,plain,
% 52.45/52.71      (pred(Y!0) = pred(n2)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[790])).
% 52.45/52.71  tff(795,plain,
% 52.45/52.71      (pred(Y!0) = n1),
% 52.45/52.71      inference(transitivity,[status(thm)],[794, 793])).
% 52.45/52.71  tff(796,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(Y!0)) = sum(n1, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 792])).
% 52.45/52.71  tff(797,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(Y!0)) = n4),
% 52.45/52.71      inference(transitivity,[status(thm)],[796, 788])).
% 52.45/52.71  tff(798,assumption,(X!1 = n9), introduced(assumption)).
% 52.45/52.71  tff(799,plain,
% 52.45/52.71      (succ(X!1) = succ(n9)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[798])).
% 52.45/52.71  tff(800,plain,
% 52.45/52.71      (succ(X!1) = n10),
% 52.45/52.71      inference(transitivity,[status(thm)],[799, 152])).
% 52.45/52.71  tff(801,plain,
% 52.45/52.71      (pred(X!1) = pred(n9)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[798])).
% 52.45/52.71  tff(802,plain,
% 52.45/52.71      (pred(X!1) = n8),
% 52.45/52.71      inference(transitivity,[status(thm)],[801, 156])).
% 52.45/52.71  tff(803,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = sum(n8, n10)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[802, 800])).
% 52.45/52.71  tff(804,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = n18),
% 52.45/52.71      inference(transitivity,[status(thm)],[803, 151])).
% 52.45/52.71  tff(805,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[804, 797])).
% 52.45/52.71  tff(806,plain,
% 52.45/52.71      (sum(n18, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[805])).
% 52.45/52.71  tff(807,plain,
% 52.45/52.71      (sum(n18, n4) = n1),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(808,plain,
% 52.45/52.71      (n1 = sum(n18, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[807])).
% 52.45/52.71  tff(809,plain,
% 52.45/52.71      (sum(n1, n10) = n11),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(810,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n10)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 800])).
% 52.45/52.71  tff(811,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.71      inference(transitivity,[status(thm)],[810, 809])).
% 52.45/52.71  tff(812,plain,
% 52.45/52.71      (sum(n8, n3) = n11),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(813,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n8, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[802, 792])).
% 52.45/52.71  tff(814,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.71      inference(transitivity,[status(thm)],[813, 812])).
% 52.45/52.71  tff(815,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[814, 811])).
% 52.45/52.71  tff(816,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[815, 438, 808, 806])).
% 52.45/52.71  tff(817,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 816])).
% 52.45/52.71  tff(818,plain,((~(X!1 = n9)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(819,plain,
% 52.45/52.71      (~(X!1 = n9)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[818, 790])).
% 52.45/52.71  tff(820,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[244, 797])).
% 52.45/52.71  tff(821,plain,
% 52.45/52.71      (sum(n20, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[820])).
% 52.45/52.71  tff(822,plain,
% 52.45/52.71      (sum(n20, n4) = n3),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(823,plain,
% 52.45/52.71      (n3 = sum(n20, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[822])).
% 52.45/52.71  tff(824,plain,
% 52.45/52.71      (sum(n1, n11) = n12),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(825,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n11)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 239])).
% 52.45/52.71  tff(826,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.71      inference(transitivity,[status(thm)],[825, 824])).
% 52.45/52.71  tff(827,plain,
% 52.45/52.71      (sum(n9, n3) = n12),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(828,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n9, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[242, 792])).
% 52.45/52.71  tff(829,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.71      inference(transitivity,[status(thm)],[828, 827])).
% 52.45/52.71  tff(830,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[829, 826])).
% 52.45/52.71  tff(831,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[830, 123, 823, 821])).
% 52.45/52.71  tff(832,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 831])).
% 52.45/52.71  tff(833,plain,((~(X!1 = n10)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(834,plain,
% 52.45/52.71      (~(X!1 = n10)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[833, 790])).
% 52.45/52.71  tff(835,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[433, 797])).
% 52.45/52.71  tff(836,plain,
% 52.45/52.71      (sum(n1, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[835])).
% 52.45/52.71  tff(837,plain,
% 52.45/52.71      (sum(n1, n4) = n5),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(838,plain,
% 52.45/52.71      (n5 = sum(n1, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[837])).
% 52.45/52.71  tff(839,plain,
% 52.45/52.71      (sum(n1, n12) = n13),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(840,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n12)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 428])).
% 52.45/52.71  tff(841,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.71      inference(transitivity,[status(thm)],[840, 839])).
% 52.45/52.71  tff(842,plain,
% 52.45/52.71      (sum(n10, n3) = n13),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(843,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n10, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[431, 792])).
% 52.45/52.71  tff(844,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.71      inference(transitivity,[status(thm)],[843, 842])).
% 52.45/52.71  tff(845,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[844, 841])).
% 52.45/52.71  tff(846,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[845, 51, 838, 836])).
% 52.45/52.71  tff(847,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 846])).
% 52.45/52.71  tff(848,plain,((~(X!1 = n11)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(849,plain,
% 52.45/52.71      (~(X!1 = n11)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[848, 790])).
% 52.45/52.71  tff(850,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[340, 797])).
% 52.45/52.71  tff(851,plain,
% 52.45/52.71      (sum(n3, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[850])).
% 52.45/52.71  tff(852,plain,
% 52.45/52.71      (sum(n3, n4) = n7),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(853,plain,
% 52.45/52.71      (n7 = sum(n3, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[852])).
% 52.45/52.71  tff(854,plain,
% 52.45/52.71      (sum(n1, n13) = n14),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(855,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n13)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 335])).
% 52.45/52.71  tff(856,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.45/52.71      inference(transitivity,[status(thm)],[855, 854])).
% 52.45/52.71  tff(857,plain,
% 52.45/52.71      (sum(n11, n3) = n14),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(858,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n11, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[338, 792])).
% 52.45/52.71  tff(859,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.45/52.71      inference(transitivity,[status(thm)],[858, 857])).
% 52.45/52.71  tff(860,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[859, 856])).
% 52.45/52.71  tff(861,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[860, 192, 853, 851])).
% 52.45/52.71  tff(862,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 861])).
% 52.45/52.71  tff(863,plain,((~(X!1 = n12)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(864,plain,
% 52.45/52.71      (~(X!1 = n12)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[863, 790])).
% 52.45/52.71  tff(865,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[70, 797])).
% 52.45/52.71  tff(866,plain,
% 52.45/52.71      (sum(n9, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[865])).
% 52.45/52.71  tff(867,plain,
% 52.45/52.71      (sum(n9, n4) = n13),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(868,plain,
% 52.45/52.71      (n13 = sum(n9, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[867])).
% 52.45/52.71  tff(869,plain,
% 52.45/52.71      (sum(n1, n16) = n17),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(870,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n16)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 66])).
% 52.45/52.71  tff(871,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.71      inference(transitivity,[status(thm)],[870, 869])).
% 52.45/52.71  tff(872,plain,
% 52.45/52.71      (sum(n14, n3) = n17),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(873,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n14, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[68, 792])).
% 52.45/52.71  tff(874,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.71      inference(transitivity,[status(thm)],[873, 872])).
% 52.45/52.71  tff(875,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[874, 871])).
% 52.45/52.71  tff(876,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[875, 358, 868, 866])).
% 52.45/52.71  tff(877,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 876])).
% 52.45/52.71  tff(878,plain,((~(X!1 = n15)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(879,plain,
% 52.45/52.71      (~(X!1 = n15)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[878, 790])).
% 52.45/52.71  tff(880,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[170, 797])).
% 52.45/52.71  tff(881,plain,
% 52.45/52.71      (sum(n8, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[880])).
% 52.45/52.71  tff(882,plain,
% 52.45/52.71      (sum(n8, n4) = n12),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(883,plain,
% 52.45/52.71      (n12 = sum(n8, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[882])).
% 52.45/52.71  tff(884,plain,
% 52.45/52.71      (sum(n1, n5) = n6),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(885,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n5)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 165])).
% 52.45/52.71  tff(886,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.45/52.71      inference(transitivity,[status(thm)],[885, 884])).
% 52.45/52.71  tff(887,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n3, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[168, 792])).
% 52.45/52.71  tff(888,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.45/52.71      inference(transitivity,[status(thm)],[887, 224])).
% 52.45/52.71  tff(889,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[888, 886])).
% 52.45/52.71  tff(890,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[889, 127, 883, 881])).
% 52.45/52.71  tff(891,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 890])).
% 52.45/52.71  tff(892,plain,((~(X!1 = n4)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(893,plain,
% 52.45/52.71      (~(X!1 = n4)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[892, 790])).
% 52.45/52.71  tff(894,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[187, 797])).
% 52.45/52.71  tff(895,plain,
% 52.45/52.71      (sum(n10, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[894])).
% 52.45/52.71  tff(896,plain,
% 52.45/52.71      (sum(n10, n4) = n14),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(897,plain,
% 52.45/52.71      (n14 = sum(n10, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[896])).
% 52.45/52.71  tff(898,plain,
% 52.45/52.71      (sum(n1, n6) = n7),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(899,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n6)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 101])).
% 52.45/52.71  tff(900,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.71      inference(transitivity,[status(thm)],[899, 898])).
% 52.45/52.71  tff(901,plain,
% 52.45/52.71      (sum(n4, n3) = n7),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(902,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n4, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[111, 792])).
% 52.45/52.71  tff(903,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.71      inference(transitivity,[status(thm)],[902, 901])).
% 52.45/52.71  tff(904,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[903, 900])).
% 52.45/52.71  tff(905,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[904, 405, 897, 895])).
% 52.45/52.71  tff(906,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 905])).
% 52.45/52.71  tff(907,plain,((~(X!1 = n5)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(908,plain,
% 52.45/52.71      (~(X!1 = n5)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[907, 790])).
% 52.45/52.71  tff(909,assumption,(X!1 = n14), introduced(assumption)).
% 52.45/52.71  tff(910,plain,
% 52.45/52.71      (succ(X!1) = succ(n14)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[909])).
% 52.45/52.71  tff(911,plain,
% 52.45/52.71      (succ(X!1) = n15),
% 52.45/52.71      inference(transitivity,[status(thm)],[910, 11])).
% 52.45/52.71  tff(912,plain,
% 52.45/52.71      (pred(X!1) = pred(n14)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[909])).
% 52.45/52.71  tff(913,plain,
% 52.45/52.71      (pred(X!1) = n13),
% 52.45/52.71      inference(transitivity,[status(thm)],[912, 279])).
% 52.45/52.71  tff(914,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = sum(n13, n15)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[913, 911])).
% 52.45/52.71  tff(915,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = n7),
% 52.45/52.71      inference(transitivity,[status(thm)],[914, 10])).
% 52.45/52.71  tff(916,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n4)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[915, 797])).
% 52.45/52.71  tff(917,plain,
% 52.45/52.71      (sum(n7, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[916])).
% 52.45/52.71  tff(918,plain,
% 52.45/52.71      (sum(n7, n4) = n11),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(919,plain,
% 52.45/52.71      (n11 = sum(n7, n4)),
% 52.45/52.71      inference(symmetry,[status(thm)],[918])).
% 52.45/52.71  tff(920,plain,
% 52.45/52.71      (sum(n1, n15) = n16),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(921,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n1, n15)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[795, 911])).
% 52.45/52.71  tff(922,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.71      inference(transitivity,[status(thm)],[921, 920])).
% 52.45/52.71  tff(923,plain,
% 52.45/52.71      (sum(n13, n3) = n16),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(924,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n13, n3)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[913, 792])).
% 52.45/52.71  tff(925,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.71      inference(transitivity,[status(thm)],[924, 923])).
% 52.45/52.71  tff(926,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[925, 922])).
% 52.45/52.71  tff(927,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[926, 208, 919, 917])).
% 52.45/52.71  tff(928,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 927])).
% 52.45/52.71  tff(929,plain,((~(X!1 = n14)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(930,plain,
% 52.45/52.71      (~(X!1 = n14)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[929, 790])).
% 52.45/52.71  tff(931,assumption,(X!1 = n6), introduced(assumption)).
% 52.45/52.71  tff(932,plain,
% 52.45/52.71      (succ(X!1) = succ(n6)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[931])).
% 52.45/52.71  tff(933,plain,
% 52.45/52.71      (succ(X!1) = n7),
% 52.45/52.71      inference(transitivity,[status(thm)],[932, 26])).
% 52.45/52.71  tff(934,plain,
% 52.45/52.71      (pred(X!1) = pred(n6)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[931])).
% 52.45/52.71  tff(935,plain,
% 52.45/52.71      (pred(X!1) = n5),
% 52.45/52.71      inference(transitivity,[status(thm)],[934, 30])).
% 52.45/52.71  tff(936,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = sum(n5, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 933])).
% 52.45/52.71  tff(937,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = n12),
% 52.45/52.71      inference(transitivity,[status(thm)],[936, 25])).
% 52.45/52.71  tff(938,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n0)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 425])).
% 52.45/52.71  tff(939,plain,
% 52.45/52.71      (sum(n12, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[938])).
% 52.45/52.71  tff(940,plain,
% 52.45/52.71      (sum(n12, n0) = n12),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(941,plain,
% 52.45/52.71      (n12 = sum(n12, n0)),
% 52.45/52.71      inference(symmetry,[status(thm)],[940])).
% 52.45/52.71  tff(942,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n20, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[423, 933])).
% 52.45/52.71  tff(943,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.45/52.71      inference(transitivity,[status(thm)],[942, 286])).
% 52.45/52.71  tff(944,plain,
% 52.45/52.71      (sum(n5, n1) = n6),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(945,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n1)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 420])).
% 52.45/52.71  tff(946,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.45/52.71      inference(transitivity,[status(thm)],[945, 944])).
% 52.45/52.71  tff(947,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[946, 943])).
% 52.45/52.71  tff(948,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[947, 127, 941, 939])).
% 52.45/52.71  tff(949,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 948])).
% 52.45/52.71  tff(950,plain,((~(Y!0 = n0)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(951,plain,
% 52.45/52.71      (~(Y!0 = n0)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[950, 931])).
% 52.45/52.71  tff(952,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n5)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 332])).
% 52.45/52.71  tff(953,plain,
% 52.45/52.71      (sum(n12, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[952])).
% 52.45/52.71  tff(954,plain,
% 52.45/52.71      (n17 = sum(n12, n5)),
% 52.45/52.71      inference(symmetry,[status(thm)],[359])).
% 52.45/52.71  tff(955,plain,
% 52.45/52.71      (sum(n12, n7) = n19),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(956,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n12, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[330, 933])).
% 52.45/52.71  tff(957,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.71      inference(transitivity,[status(thm)],[956, 955])).
% 52.45/52.71  tff(958,plain,
% 52.45/52.71      (sum(n5, n14) = n19),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(959,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n14)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 327])).
% 52.45/52.71  tff(960,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.71      inference(transitivity,[status(thm)],[959, 958])).
% 52.45/52.71  tff(961,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[960, 957])).
% 52.45/52.71  tff(962,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[961, 776, 954, 953])).
% 52.45/52.71  tff(963,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 962])).
% 52.45/52.71  tff(964,plain,((~(Y!0 = n13)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(965,plain,
% 52.45/52.71      (~(Y!0 = n13)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[964, 931])).
% 52.45/52.71  tff(966,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n18)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 160])).
% 52.45/52.71  tff(967,plain,
% 52.45/52.71      (sum(n12, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[966])).
% 52.45/52.71  tff(968,plain,
% 52.45/52.71      (sum(n12, n18) = n9),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(969,plain,
% 52.45/52.71      (n9 = sum(n12, n18)),
% 52.45/52.71      inference(symmetry,[status(thm)],[968])).
% 52.45/52.71  tff(970,plain,
% 52.45/52.71      (sum(n8, n7) = n15),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(971,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n8, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[158, 933])).
% 52.45/52.71  tff(972,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.71      inference(transitivity,[status(thm)],[971, 970])).
% 52.45/52.71  tff(973,plain,
% 52.45/52.71      (sum(n5, n10) = n15),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(974,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n10)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 155])).
% 52.45/52.71  tff(975,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.71      inference(transitivity,[status(thm)],[974, 973])).
% 52.45/52.71  tff(976,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[975, 972])).
% 52.45/52.71  tff(977,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[976, 513, 969, 967])).
% 52.45/52.71  tff(978,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 977])).
% 52.45/52.71  tff(979,plain,((~(Y!0 = n9)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(980,plain,
% 52.45/52.71      (~(Y!0 = n9)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[979, 931])).
% 52.45/52.71  tff(981,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n10)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 96])).
% 52.45/52.71  tff(982,plain,
% 52.45/52.71      (sum(n12, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[981])).
% 52.45/52.71  tff(983,plain,
% 52.45/52.71      (sum(n12, n10) = n1),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(984,plain,
% 52.45/52.71      (n1 = sum(n12, n10)),
% 52.45/52.71      inference(symmetry,[status(thm)],[983])).
% 52.45/52.71  tff(985,plain,
% 52.45/52.71      (sum(n4, n7) = n11),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(986,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n4, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[94, 933])).
% 52.45/52.71  tff(987,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.71      inference(transitivity,[status(thm)],[986, 985])).
% 52.45/52.71  tff(988,plain,
% 52.45/52.71      (sum(n5, n6) = n11),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(989,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n6)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 91])).
% 52.45/52.71  tff(990,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.71      inference(transitivity,[status(thm)],[989, 988])).
% 52.45/52.71  tff(991,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[990, 987])).
% 52.45/52.71  tff(992,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[991, 438, 984, 982])).
% 52.45/52.71  tff(993,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 992])).
% 52.45/52.71  tff(994,plain,((~(Y!0 = n5)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(995,plain,
% 52.45/52.71      (~(Y!0 = n5)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[994, 931])).
% 52.45/52.71  tff(996,plain,
% 52.45/52.71      (succ(n6) = succ(X!1)),
% 52.45/52.71      inference(symmetry,[status(thm)],[932])).
% 52.45/52.71  tff(997,plain,
% 52.45/52.71      (succ(Y!0) = succ(X!1)),
% 52.45/52.71      inference(transitivity,[status(thm)],[28, 996])).
% 52.45/52.71  tff(998,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.45/52.71      inference(monotonicity,[status(thm)],[997])).
% 52.45/52.71  tff(999,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 29])).
% 52.45/52.71  tff(1000,plain,
% 52.45/52.71      (sum(n5, n7) = sum(pred(X!1), succ(Y!0))),
% 52.45/52.71      inference(symmetry,[status(thm)],[999])).
% 52.45/52.71  tff(1001,plain,
% 52.45/52.71      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.45/52.71      inference(transitivity,[status(thm)],[936, 1000])).
% 52.45/52.71  tff(1002,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1001, 998])).
% 52.45/52.71  tff(1003,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[1002])).
% 52.45/52.71  tff(1004,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 1003])).
% 52.45/52.71  tff(1005,plain,((~(Y!0 = n6)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(1006,plain,
% 52.45/52.71      (~(Y!0 = n6)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[1005, 931])).
% 52.45/52.71  tff(1007,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n9)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 21])).
% 52.45/52.71  tff(1008,plain,
% 52.45/52.71      (sum(n12, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[1007])).
% 52.45/52.71  tff(1009,plain,
% 52.45/52.71      (sum(n12, n9) = n0),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(1010,plain,
% 52.45/52.71      (n0 = sum(n12, n9)),
% 52.45/52.71      inference(symmetry,[status(thm)],[1009])).
% 52.45/52.71  tff(1011,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n14, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[19, 933])).
% 52.45/52.71  tff(1012,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.45/52.71      inference(transitivity,[status(thm)],[1011, 79])).
% 52.45/52.71  tff(1013,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n16)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 16])).
% 52.45/52.71  tff(1014,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.45/52.71      inference(transitivity,[status(thm)],[1013, 76])).
% 52.45/52.71  tff(1015,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1014, 1012])).
% 52.45/52.71  tff(1016,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[1015, 75, 1010, 1008])).
% 52.45/52.71  tff(1017,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 1016])).
% 52.45/52.71  tff(1018,plain,((~(Y!0 = n15)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(1019,plain,
% 52.45/52.71      (~(Y!0 = n15)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[1018, 931])).
% 52.45/52.71  tff(1020,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 283])).
% 52.45/52.71  tff(1021,plain,
% 52.45/52.71      (sum(n12, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[1020])).
% 52.45/52.71  tff(1022,plain,
% 52.45/52.71      (n19 = sum(n12, n7)),
% 52.45/52.71      inference(symmetry,[status(thm)],[955])).
% 52.45/52.71  tff(1023,plain,
% 52.45/52.71      (sum(n13, n7) = n20),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(1024,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n13, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[281, 933])).
% 52.45/52.71  tff(1025,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.45/52.71      inference(transitivity,[status(thm)],[1024, 1023])).
% 52.45/52.71  tff(1026,plain,
% 52.45/52.71      (sum(n5, n15) = n20),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(1027,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n15)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 278])).
% 52.45/52.71  tff(1028,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.45/52.71      inference(transitivity,[status(thm)],[1027, 1026])).
% 52.45/52.71  tff(1029,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1028, 1025])).
% 52.45/52.71  tff(1030,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[1029, 139, 1022, 1021])).
% 52.45/52.71  tff(1031,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 1030])).
% 52.45/52.71  tff(1032,plain,((~(Y!0 = n14)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(1033,plain,
% 52.45/52.71      (~(Y!0 = n14)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[1032, 931])).
% 52.45/52.71  tff(1034,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n2)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[937, 635])).
% 52.45/52.71  tff(1035,plain,
% 52.45/52.71      (sum(n12, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(symmetry,[status(thm)],[1034])).
% 52.45/52.71  tff(1036,plain,
% 52.45/52.71      (sum(n12, n2) = n14),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(1037,plain,
% 52.45/52.71      (n14 = sum(n12, n2)),
% 52.45/52.71      inference(symmetry,[status(thm)],[1036])).
% 52.45/52.71  tff(1038,plain,
% 52.45/52.71      (sum(n0, n7) = n7),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(1039,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = sum(n0, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[633, 933])).
% 52.45/52.71  tff(1040,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.71      inference(transitivity,[status(thm)],[1039, 1038])).
% 52.45/52.71  tff(1041,plain,
% 52.45/52.71      (sum(n5, n2) = n7),
% 52.45/52.71      inference(and_elim,[status(thm)],[9])).
% 52.45/52.71  tff(1042,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = sum(n5, n2)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[935, 630])).
% 52.45/52.71  tff(1043,plain,
% 52.45/52.71      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.71      inference(transitivity,[status(thm)],[1042, 1041])).
% 52.45/52.71  tff(1044,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1043, 1040])).
% 52.45/52.71  tff(1045,plain,
% 52.45/52.71      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.71      inference(transitivity,[status(thm)],[1044, 405, 1037, 1035])).
% 52.45/52.71  tff(1046,plain,
% 52.45/52.71      ($false),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[60, 1045])).
% 52.45/52.71  tff(1047,plain,((~(Y!0 = n1)) | (~(X!1 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.71  tff(1048,plain,
% 52.45/52.71      (~(Y!0 = n1)),
% 52.45/52.71      inference(unit_resolution,[status(thm)],[1047, 931])).
% 52.45/52.71  tff(1049,assumption,(Y!0 = n7), introduced(assumption)).
% 52.45/52.71  tff(1050,plain,
% 52.45/52.71      (succ(Y!0) = succ(n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1049])).
% 52.45/52.71  tff(1051,plain,
% 52.45/52.71      (succ(Y!0) = n8),
% 52.45/52.71      inference(transitivity,[status(thm)],[1050, 38])).
% 52.45/52.71  tff(1052,plain,
% 52.45/52.71      (pred(Y!0) = pred(n7)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1049])).
% 52.45/52.71  tff(1053,plain,
% 52.45/52.71      (pred(Y!0) = n6),
% 52.45/52.71      inference(transitivity,[status(thm)],[1052, 42])).
% 52.45/52.71  tff(1054,plain,
% 52.45/52.71      (sum(pred(Y!0), succ(Y!0)) = sum(n6, n8)),
% 52.45/52.71      inference(monotonicity,[status(thm)],[1053, 1051])).
% 52.45/52.72  tff(1055,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(Y!0)) = n14),
% 52.45/52.72      inference(transitivity,[status(thm)],[1054, 37])).
% 52.45/52.72  tff(1056,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[534, 1055])).
% 52.45/52.72  tff(1057,plain,
% 52.45/52.72      (sum(n16, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1056])).
% 52.45/52.72  tff(1058,plain,
% 52.45/52.72      (sum(n16, n14) = n9),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1059,plain,
% 52.45/52.72      (n9 = sum(n16, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1058])).
% 52.45/52.72  tff(1060,plain,
% 52.45/52.72      (sum(n6, n9) = n15),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1061,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n9)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 529])).
% 52.45/52.72  tff(1062,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.72      inference(transitivity,[status(thm)],[1061, 1060])).
% 52.45/52.72  tff(1063,plain,
% 52.45/52.72      (sum(n7, n8) = n15),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1064,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n7, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[532, 1051])).
% 52.45/52.72  tff(1065,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.72      inference(transitivity,[status(thm)],[1064, 1063])).
% 52.45/52.72  tff(1066,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1065, 1062])).
% 52.45/52.72  tff(1067,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1066, 513, 1059, 1057])).
% 52.45/52.72  tff(1068,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1067])).
% 52.45/52.72  tff(1069,plain,((~(X!1 = n8)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1070,plain,
% 52.45/52.72      (~(X!1 = n8)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1069, 1049])).
% 52.45/52.72  tff(1071,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[804, 1055])).
% 52.45/52.72  tff(1072,plain,
% 52.45/52.72      (sum(n18, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1071])).
% 52.45/52.72  tff(1073,plain,
% 52.45/52.72      (sum(n18, n14) = n11),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1074,plain,
% 52.45/52.72      (n11 = sum(n18, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1073])).
% 52.45/52.72  tff(1075,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n10)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 800])).
% 52.45/52.72  tff(1076,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.72      inference(transitivity,[status(thm)],[1075, 212])).
% 52.45/52.72  tff(1077,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n8, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[802, 1051])).
% 52.45/52.72  tff(1078,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.72      inference(transitivity,[status(thm)],[1077, 209])).
% 52.45/52.72  tff(1079,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1078, 1076])).
% 52.45/52.72  tff(1080,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1079, 208, 1074, 1072])).
% 52.45/52.72  tff(1081,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1080])).
% 52.45/52.72  tff(1082,plain,((~(X!1 = n9)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1083,plain,
% 52.45/52.72      (~(X!1 = n9)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1082, 1049])).
% 52.45/52.72  tff(1084,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[244, 1055])).
% 52.45/52.72  tff(1085,plain,
% 52.45/52.72      (sum(n20, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1084])).
% 52.45/52.72  tff(1086,plain,
% 52.45/52.72      (sum(n20, n14) = n13),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1087,plain,
% 52.45/52.72      (n13 = sum(n20, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1086])).
% 52.45/52.72  tff(1088,plain,
% 52.45/52.72      (sum(n6, n11) = n17),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1089,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n11)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 239])).
% 52.45/52.72  tff(1090,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.72      inference(transitivity,[status(thm)],[1089, 1088])).
% 52.45/52.72  tff(1091,plain,
% 52.45/52.72      (sum(n9, n8) = n17),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1092,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n9, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[242, 1051])).
% 52.45/52.72  tff(1093,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.72      inference(transitivity,[status(thm)],[1092, 1091])).
% 52.45/52.72  tff(1094,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1093, 1090])).
% 52.45/52.72  tff(1095,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1094, 358, 1087, 1085])).
% 52.45/52.72  tff(1096,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1095])).
% 52.45/52.72  tff(1097,plain,((~(X!1 = n10)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1098,plain,
% 52.45/52.72      (~(X!1 = n10)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1097, 1049])).
% 52.45/52.72  tff(1099,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[433, 1055])).
% 52.45/52.72  tff(1100,plain,
% 52.45/52.72      (sum(n1, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1099])).
% 52.45/52.72  tff(1101,plain,
% 52.45/52.72      (sum(n1, n14) = n15),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1102,plain,
% 52.45/52.72      (n15 = sum(n1, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1101])).
% 52.45/52.72  tff(1103,plain,
% 52.45/52.72      (sum(n6, n12) = n18),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1104,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n12)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 428])).
% 52.45/52.72  tff(1105,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.45/52.72      inference(transitivity,[status(thm)],[1104, 1103])).
% 52.45/52.72  tff(1106,plain,
% 52.45/52.72      (sum(n10, n8) = n18),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1107,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n10, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[431, 1051])).
% 52.45/52.72  tff(1108,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.45/52.72      inference(transitivity,[status(thm)],[1107, 1106])).
% 52.45/52.72  tff(1109,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1108, 1105])).
% 52.45/52.72  tff(1110,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1109, 374, 1102, 1100])).
% 52.45/52.72  tff(1111,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1110])).
% 52.45/52.72  tff(1112,plain,((~(X!1 = n11)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1113,plain,
% 52.45/52.72      (~(X!1 = n11)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1112, 1049])).
% 52.45/52.72  tff(1114,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[70, 1055])).
% 52.45/52.72  tff(1115,plain,
% 52.45/52.72      (sum(n9, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1114])).
% 52.45/52.72  tff(1116,plain,
% 52.45/52.72      (sum(n9, n14) = n2),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1117,plain,
% 52.45/52.72      (n2 = sum(n9, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1116])).
% 52.45/52.72  tff(1118,plain,
% 52.45/52.72      (sum(n6, n16) = n1),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1119,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n16)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 66])).
% 52.45/52.72  tff(1120,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.45/52.72      inference(transitivity,[status(thm)],[1119, 1118])).
% 52.45/52.72  tff(1121,plain,
% 52.45/52.72      (sum(n14, n8) = n1),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1122,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n14, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[68, 1051])).
% 52.45/52.72  tff(1123,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.45/52.72      inference(transitivity,[status(thm)],[1122, 1121])).
% 52.45/52.72  tff(1124,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1123, 1120])).
% 52.45/52.72  tff(1125,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1124, 599, 1117, 1115])).
% 52.45/52.72  tff(1126,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1125])).
% 52.45/52.72  tff(1127,plain,((~(X!1 = n15)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1128,plain,
% 52.45/52.72      (~(X!1 = n15)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1127, 1049])).
% 52.45/52.72  tff(1129,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[340, 1055])).
% 52.45/52.72  tff(1130,plain,
% 52.45/52.72      (sum(n3, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1129])).
% 52.45/52.72  tff(1131,plain,
% 52.45/52.72      (n17 = sum(n3, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[362])).
% 52.45/52.72  tff(1132,plain,
% 52.45/52.72      (sum(n6, n13) = n19),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1133,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n13)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 335])).
% 52.45/52.72  tff(1134,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.72      inference(transitivity,[status(thm)],[1133, 1132])).
% 52.45/52.72  tff(1135,plain,
% 52.45/52.72      (sum(n11, n8) = n19),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1136,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n11, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[338, 1051])).
% 52.45/52.72  tff(1137,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.72      inference(transitivity,[status(thm)],[1136, 1135])).
% 52.45/52.72  tff(1138,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1137, 1134])).
% 52.45/52.72  tff(1139,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1138, 776, 1131, 1130])).
% 52.45/52.72  tff(1140,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1139])).
% 52.45/52.72  tff(1141,plain,((~(X!1 = n12)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1142,plain,
% 52.45/52.72      (~(X!1 = n12)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1141, 1049])).
% 52.45/52.72  tff(1143,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[170, 1055])).
% 52.45/52.72  tff(1144,plain,
% 52.45/52.72      (sum(n8, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1143])).
% 52.45/52.72  tff(1145,plain,
% 52.45/52.72      (sum(n8, n14) = n1),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1146,plain,
% 52.45/52.72      (n1 = sum(n8, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1145])).
% 52.45/52.72  tff(1147,plain,
% 52.45/52.72      (sum(n6, n5) = n11),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1148,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n5)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 165])).
% 52.45/52.72  tff(1149,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.72      inference(transitivity,[status(thm)],[1148, 1147])).
% 52.45/52.72  tff(1150,plain,
% 52.45/52.72      (sum(n3, n8) = n11),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1151,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n3, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[168, 1051])).
% 52.45/52.72  tff(1152,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.72      inference(transitivity,[status(thm)],[1151, 1150])).
% 52.45/52.72  tff(1153,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1152, 1149])).
% 52.45/52.72  tff(1154,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1153, 438, 1146, 1144])).
% 52.45/52.72  tff(1155,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1154])).
% 52.45/52.72  tff(1156,plain,((~(X!1 = n4)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1157,plain,
% 52.45/52.72      (~(X!1 = n4)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1156, 1049])).
% 52.45/52.72  tff(1158,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[642, 1055])).
% 52.45/52.72  tff(1159,plain,
% 52.45/52.72      (sum(n11, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1158])).
% 52.45/52.72  tff(1160,plain,
% 52.45/52.72      (n4 = sum(n11, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[347])).
% 52.45/52.72  tff(1161,plain,
% 52.45/52.72      (sum(n6, n17) = n2),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1162,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n17)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 638])).
% 52.45/52.72  tff(1163,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.45/52.72      inference(transitivity,[status(thm)],[1162, 1161])).
% 52.45/52.72  tff(1164,plain,
% 52.45/52.72      (sum(n15, n8) = n2),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1165,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n15, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[640, 1051])).
% 52.45/52.72  tff(1166,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.45/52.72      inference(transitivity,[status(thm)],[1165, 1164])).
% 52.45/52.72  tff(1167,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1166, 1163])).
% 52.45/52.72  tff(1168,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1167, 583, 1160, 1159])).
% 52.45/52.72  tff(1169,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1168])).
% 52.45/52.72  tff(1170,plain,((~(Y!0 = n7)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1171,plain,
% 52.45/52.72      (~(X!1 = n16)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1170, 1049])).
% 52.45/52.72  tff(1172,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[915, 1055])).
% 52.45/52.72  tff(1173,plain,
% 52.45/52.72      (sum(n7, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1172])).
% 52.45/52.72  tff(1174,plain,
% 52.45/52.72      (sum(n7, n14) = n0),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1175,plain,
% 52.45/52.72      (n0 = sum(n7, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1174])).
% 52.45/52.72  tff(1176,plain,
% 52.45/52.72      (sum(n6, n15) = n0),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1177,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n15)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 911])).
% 52.45/52.72  tff(1178,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.45/52.72      inference(transitivity,[status(thm)],[1177, 1176])).
% 52.45/52.72  tff(1179,plain,
% 52.45/52.72      (sum(n13, n8) = n0),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1180,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n13, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[913, 1051])).
% 52.45/52.72  tff(1181,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.45/52.72      inference(transitivity,[status(thm)],[1180, 1179])).
% 52.45/52.72  tff(1182,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1181, 1178])).
% 52.45/52.72  tff(1183,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1182, 75, 1175, 1173])).
% 52.45/52.72  tff(1184,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1183])).
% 52.45/52.72  tff(1185,plain,((~(X!1 = n14)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1186,plain,
% 52.45/52.72      (~(X!1 = n14)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1185, 1049])).
% 52.45/52.72  tff(1187,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[187, 1055])).
% 52.45/52.72  tff(1188,plain,
% 52.45/52.72      (sum(n10, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1187])).
% 52.45/52.72  tff(1189,plain,
% 52.45/52.72      (sum(n10, n14) = n3),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1190,plain,
% 52.45/52.72      (n3 = sum(n10, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1189])).
% 52.45/52.72  tff(1191,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n6)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 101])).
% 52.45/52.72  tff(1192,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.72      inference(transitivity,[status(thm)],[1191, 127])).
% 52.45/52.72  tff(1193,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n4, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[111, 1051])).
% 52.45/52.72  tff(1194,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.72      inference(transitivity,[status(thm)],[1193, 124])).
% 52.45/52.72  tff(1195,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1194, 1192])).
% 52.45/52.72  tff(1196,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1195, 123, 1190, 1188])).
% 52.45/52.72  tff(1197,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1196])).
% 52.45/52.72  tff(1198,plain,((~(X!1 = n5)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1199,plain,
% 52.45/52.72      (~(X!1 = n5)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1198, 1049])).
% 52.45/52.72  tff(1200,plain,
% 52.45/52.72      ((Y!0 = n18) <=> (n7 = n18)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1049])).
% 52.45/52.72  tff(1201,plain,
% 52.45/52.72      ((n7 = n18) <=> (Y!0 = n18)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1200])).
% 52.45/52.72  tff(1202,plain,
% 52.45/52.72      ((~(n7 = n18)) <=> (~(Y!0 = n18))),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1201])).
% 52.45/52.72  tff(1203,plain,
% 52.45/52.72      (~(n7 = n18)),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1204,plain,
% 52.45/52.72      (~(Y!0 = n18)),
% 52.45/52.72      inference(modus_ponens,[status(thm)],[1203, 1202])).
% 52.45/52.72  tff(1205,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[772, 1055])).
% 52.45/52.72  tff(1206,plain,
% 52.45/52.72      (sum(n15, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1205])).
% 52.45/52.72  tff(1207,plain,
% 52.45/52.72      (sum(n15, n14) = n8),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1208,plain,
% 52.45/52.72      (n8 = sum(n15, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1207])).
% 52.45/52.72  tff(1209,plain,
% 52.45/52.72      (sum(n6, n19) = n4),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1210,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n19)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 767])).
% 52.45/52.72  tff(1211,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.45/52.72      inference(transitivity,[status(thm)],[1210, 1209])).
% 52.45/52.72  tff(1212,plain,
% 52.45/52.72      (sum(n17, n8) = n4),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1213,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n17, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[770, 1051])).
% 52.45/52.72  tff(1214,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.45/52.72      inference(transitivity,[status(thm)],[1213, 1212])).
% 52.45/52.72  tff(1215,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1214, 1211])).
% 52.45/52.72  tff(1216,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1215, 264, 1208, 1206])).
% 52.45/52.72  tff(1217,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1216])).
% 52.45/52.72  tff(1218,plain,((~(Y!0 = n7)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1219,plain,
% 52.45/52.72      (~(X!1 = n18)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1218, 1049])).
% 52.45/52.72  tff(1220,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[937, 1055])).
% 52.45/52.72  tff(1221,plain,
% 52.45/52.72      (sum(n12, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1220])).
% 52.45/52.72  tff(1222,plain,
% 52.45/52.72      (n5 = sum(n12, n14)),
% 52.45/52.72      inference(symmetry,[status(thm)],[22])).
% 52.45/52.72  tff(1223,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n7)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 933])).
% 52.45/52.72  tff(1224,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.72      inference(transitivity,[status(thm)],[1223, 55])).
% 52.45/52.72  tff(1225,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n5, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[935, 1051])).
% 52.45/52.72  tff(1226,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.72      inference(transitivity,[status(thm)],[1225, 52])).
% 52.45/52.72  tff(1227,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1226, 1224])).
% 52.45/52.72  tff(1228,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1227, 51, 1222, 1221])).
% 52.45/52.72  tff(1229,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1228])).
% 52.45/52.72  tff(1230,plain,((~(X!1 = n6)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1231,plain,
% 52.45/52.72      (~(X!1 = n6)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1230, 1049])).
% 52.45/52.72  tff(1232,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n6, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1053, 41])).
% 52.45/52.72  tff(1233,plain,
% 52.45/52.72      (pred(n7) = pred(Y!0)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1052])).
% 52.45/52.72  tff(1234,plain,
% 52.45/52.72      (pred(X!1) = pred(Y!0)),
% 52.45/52.72      inference(transitivity,[status(thm)],[43, 1233])).
% 52.45/52.72  tff(1235,plain,
% 52.45/52.72      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1234])).
% 52.45/52.72  tff(1236,plain,
% 52.45/52.72      (sum(pred(X!1), succ(X!1)) = n14),
% 52.45/52.72      inference(transitivity,[status(thm)],[1235, 1232, 37])).
% 52.45/52.72  tff(1237,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1236, 1055])).
% 52.45/52.72  tff(1238,plain,
% 52.45/52.72      (sum(n14, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1237])).
% 52.45/52.72  tff(1239,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.45/52.72      inference(transitivity,[status(thm)],[1232, 37])).
% 52.45/52.72  tff(1240,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n6, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[44, 1051])).
% 52.45/52.72  tff(1241,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.45/52.72      inference(transitivity,[status(thm)],[1240, 37])).
% 52.45/52.72  tff(1242,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1241, 1239])).
% 52.45/52.72  tff(1243,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1242, 1238])).
% 52.45/52.72  tff(1244,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1243])).
% 52.45/52.72  tff(1245,plain,((~(X!1 = n7)) | (~(Y!0 = n7))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1246,plain,
% 52.45/52.72      (~(X!1 = n7)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1245, 1049])).
% 52.45/52.72  tff(1247,assumption,(X!1 = n3), introduced(assumption)).
% 52.45/52.72  tff(1248,plain,
% 52.45/52.72      (sum(n2, n4) = n6),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1249,plain,
% 52.45/52.72      (succ(n3) = n4),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1250,plain,
% 52.45/52.72      (succ(X!1) = succ(n3)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1247])).
% 52.45/52.72  tff(1251,plain,
% 52.45/52.72      (succ(X!1) = n4),
% 52.45/52.72      inference(transitivity,[status(thm)],[1250, 1249])).
% 52.45/52.72  tff(1252,plain,
% 52.45/52.72      (pred(n3) = n2),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1253,plain,
% 52.45/52.72      (pred(X!1) = pred(n3)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1247])).
% 52.45/52.72  tff(1254,plain,
% 52.45/52.72      (pred(X!1) = n2),
% 52.45/52.72      inference(transitivity,[status(thm)],[1253, 1252])).
% 52.45/52.72  tff(1255,plain,
% 52.45/52.72      (sum(pred(X!1), succ(X!1)) = sum(n2, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 1251])).
% 52.45/52.72  tff(1256,plain,
% 52.45/52.72      (sum(pred(X!1), succ(X!1)) = n6),
% 52.45/52.72      inference(transitivity,[status(thm)],[1255, 1248])).
% 52.45/52.72  tff(1257,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n0)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1256, 425])).
% 52.45/52.72  tff(1258,plain,
% 52.45/52.72      (sum(n6, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1257])).
% 52.45/52.72  tff(1259,plain,
% 52.45/52.72      (sum(n6, n0) = n6),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1260,plain,
% 52.45/52.72      (n6 = sum(n6, n0)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1259])).
% 52.45/52.72  tff(1261,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n20, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[423, 1251])).
% 52.45/52.72  tff(1262,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.72      inference(transitivity,[status(thm)],[1261, 822])).
% 52.45/52.72  tff(1263,plain,
% 52.45/52.72      (sum(n2, n1) = n3),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1264,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n2, n1)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 420])).
% 52.45/52.72  tff(1265,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.72      inference(transitivity,[status(thm)],[1264, 1263])).
% 52.45/52.72  tff(1266,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1265, 1262])).
% 52.45/52.72  tff(1267,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1266, 224, 1260, 1258])).
% 52.45/52.72  tff(1268,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1267])).
% 52.45/52.72  tff(1269,plain,((~(Y!0 = n0)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1270,plain,
% 52.45/52.72      (~(Y!0 = n0)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1269, 1247])).
% 52.45/52.72  tff(1271,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n5)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1256, 332])).
% 52.45/52.72  tff(1272,plain,
% 52.45/52.72      (sum(n6, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1271])).
% 52.45/52.72  tff(1273,plain,
% 52.45/52.72      (n11 = sum(n6, n5)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1147])).
% 52.45/52.72  tff(1274,plain,
% 52.45/52.72      (sum(n12, n4) = n16),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1275,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n12, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[330, 1251])).
% 52.45/52.72  tff(1276,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.72      inference(transitivity,[status(thm)],[1275, 1274])).
% 52.45/52.72  tff(1277,plain,
% 52.45/52.72      (sum(n2, n14) = n16),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1278,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n2, n14)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 327])).
% 52.45/52.72  tff(1279,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.72      inference(transitivity,[status(thm)],[1278, 1277])).
% 52.45/52.72  tff(1280,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1279, 1276])).
% 52.45/52.72  tff(1281,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1280, 208, 1273, 1272])).
% 52.45/52.72  tff(1282,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1281])).
% 52.45/52.72  tff(1283,plain,((~(Y!0 = n13)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1284,plain,
% 52.45/52.72      (~(Y!0 = n13)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1283, 1247])).
% 52.45/52.72  tff(1285,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n18)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1256, 160])).
% 52.45/52.72  tff(1286,plain,
% 52.45/52.72      (sum(n6, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1285])).
% 52.45/52.72  tff(1287,plain,
% 52.45/52.72      (sum(n6, n18) = n3),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1288,plain,
% 52.45/52.72      (n3 = sum(n6, n18)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1287])).
% 52.45/52.72  tff(1289,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n8, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[158, 1251])).
% 52.45/52.72  tff(1290,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.72      inference(transitivity,[status(thm)],[1289, 882])).
% 52.45/52.72  tff(1291,plain,
% 52.45/52.72      (sum(n2, n10) = n12),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1292,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n2, n10)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 155])).
% 52.45/52.72  tff(1293,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.72      inference(transitivity,[status(thm)],[1292, 1291])).
% 52.45/52.72  tff(1294,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1293, 1290])).
% 52.45/52.72  tff(1295,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1294, 123, 1288, 1286])).
% 52.45/52.72  tff(1296,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1295])).
% 52.45/52.72  tff(1297,plain,((~(Y!0 = n9)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1298,plain,
% 52.45/52.72      (~(Y!0 = n9)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1297, 1247])).
% 52.45/52.72  tff(1299,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n10)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1256, 96])).
% 52.45/52.72  tff(1300,plain,
% 52.45/52.72      (sum(n6, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1299])).
% 52.45/52.72  tff(1301,plain,
% 52.45/52.72      (n16 = sum(n6, n10)),
% 52.45/52.72      inference(symmetry,[status(thm)],[212])).
% 52.45/52.72  tff(1302,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n4, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[94, 1251])).
% 52.45/52.72  tff(1303,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.45/52.72      inference(transitivity,[status(thm)],[1302, 264])).
% 52.45/52.72  tff(1304,plain,
% 52.45/52.72      (sum(n2, n6) = n8),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1305,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n2, n6)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 91])).
% 52.45/52.72  tff(1306,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.45/52.72      inference(transitivity,[status(thm)],[1305, 1304])).
% 52.45/52.72  tff(1307,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1306, 1303])).
% 52.45/52.72  tff(1308,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1307, 209, 1301, 1300])).
% 52.45/52.72  tff(1309,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1308])).
% 52.45/52.72  tff(1310,plain,((~(Y!0 = n5)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1311,plain,
% 52.45/52.72      (~(Y!0 = n5)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1310, 1247])).
% 52.45/52.72  tff(1312,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n12)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1256, 34])).
% 52.45/52.72  tff(1313,plain,
% 52.45/52.72      (sum(n6, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1312])).
% 52.45/52.72  tff(1314,plain,
% 52.45/52.72      (n18 = sum(n6, n12)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1103])).
% 52.45/52.72  tff(1315,plain,
% 52.45/52.72      (sum(n9, n9) = n18),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1316,plain,
% 52.45/52.72      (sum(n5, n4) = n9),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1317,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n5, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[32, 1251])).
% 52.45/52.72  tff(1318,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.45/52.72      inference(transitivity,[status(thm)],[1317, 1316])).
% 52.45/52.72  tff(1319,plain,
% 52.45/52.72      (sum(n2, n7) = n9),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1320,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n2, n7)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 29])).
% 52.45/52.72  tff(1321,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.45/52.72      inference(transitivity,[status(thm)],[1320, 1319])).
% 52.45/52.72  tff(1322,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1321, 1318])).
% 52.45/52.72  tff(1323,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(transitivity,[status(thm)],[1322, 1315, 1314, 1313])).
% 52.45/52.72  tff(1324,plain,
% 52.45/52.72      ($false),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[60, 1323])).
% 52.45/52.72  tff(1325,plain,((~(Y!0 = n6)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.72  tff(1326,plain,
% 52.45/52.72      (~(Y!0 = n6)),
% 52.45/52.72      inference(unit_resolution,[status(thm)],[1325, 1247])).
% 52.45/52.72  tff(1327,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n9)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1256, 21])).
% 52.45/52.72  tff(1328,plain,
% 52.45/52.72      (sum(n6, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.72      inference(symmetry,[status(thm)],[1327])).
% 52.45/52.72  tff(1329,plain,
% 52.45/52.72      (n15 = sum(n6, n9)),
% 52.45/52.72      inference(symmetry,[status(thm)],[1060])).
% 52.45/52.72  tff(1330,plain,
% 52.45/52.72      (sum(n14, n4) = n18),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1331,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = sum(n14, n4)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[19, 1251])).
% 52.45/52.72  tff(1332,plain,
% 52.45/52.72      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.45/52.72      inference(transitivity,[status(thm)],[1331, 1330])).
% 52.45/52.72  tff(1333,plain,
% 52.45/52.72      (sum(n2, n16) = n18),
% 52.45/52.72      inference(and_elim,[status(thm)],[9])).
% 52.45/52.72  tff(1334,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = sum(n2, n16)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1254, 16])).
% 52.45/52.72  tff(1335,plain,
% 52.45/52.72      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.45/52.72      inference(transitivity,[status(thm)],[1334, 1333])).
% 52.45/52.72  tff(1336,plain,
% 52.45/52.72      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.45/52.72      inference(monotonicity,[status(thm)],[1335, 1332])).
% 52.45/52.73  tff(1337,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1336, 374, 1329, 1328])).
% 52.45/52.73  tff(1338,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1337])).
% 52.45/52.73  tff(1339,plain,((~(Y!0 = n15)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1340,plain,
% 52.45/52.73      (~(Y!0 = n15)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1339, 1247])).
% 52.45/52.73  tff(1341,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n7)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 283])).
% 52.45/52.73  tff(1342,plain,
% 52.45/52.73      (sum(n6, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1341])).
% 52.45/52.73  tff(1343,plain,
% 52.45/52.73      (n13 = sum(n6, n7)),
% 52.45/52.73      inference(symmetry,[status(thm)],[55])).
% 52.45/52.73  tff(1344,plain,
% 52.45/52.73      (sum(n13, n4) = n17),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1345,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n13, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[281, 1251])).
% 52.45/52.73  tff(1346,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.73      inference(transitivity,[status(thm)],[1345, 1344])).
% 52.45/52.73  tff(1347,plain,
% 52.45/52.73      (sum(n2, n15) = n17),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1348,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n15)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 278])).
% 52.45/52.73  tff(1349,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.73      inference(transitivity,[status(thm)],[1348, 1347])).
% 52.45/52.73  tff(1350,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1349, 1346])).
% 52.45/52.73  tff(1351,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1350, 358, 1343, 1342])).
% 52.45/52.73  tff(1352,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1351])).
% 52.45/52.73  tff(1353,plain,((~(Y!0 = n14)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1354,plain,
% 52.45/52.73      (~(Y!0 = n14)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1353, 1247])).
% 52.45/52.73  tff(1355,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n14)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 1055])).
% 52.45/52.73  tff(1356,plain,
% 52.45/52.73      (sum(n6, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1355])).
% 52.45/52.73  tff(1357,plain,
% 52.45/52.73      (n20 = sum(n6, n14)),
% 52.45/52.73      inference(symmetry,[status(thm)],[393])).
% 52.45/52.73  tff(1358,plain,
% 52.45/52.73      (sum(n10, n10) = n20),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1359,plain,
% 52.45/52.73      (sum(n6, n4) = n10),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1360,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n6, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1053, 1251])).
% 52.45/52.73  tff(1361,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.45/52.73      inference(transitivity,[status(thm)],[1360, 1359])).
% 52.45/52.73  tff(1362,plain,
% 52.45/52.73      (sum(n2, n8) = n10),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1363,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n8)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 1051])).
% 52.45/52.73  tff(1364,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.45/52.73      inference(transitivity,[status(thm)],[1363, 1362])).
% 52.45/52.73  tff(1365,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1364, 1361])).
% 52.45/52.73  tff(1366,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1365, 1358, 1357, 1356])).
% 52.45/52.73  tff(1367,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1366])).
% 52.45/52.73  tff(1368,plain,((~(Y!0 = n7)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1369,plain,
% 52.45/52.73      (~(Y!0 = n7)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1368, 1247])).
% 52.45/52.73  tff(1370,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n11)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 308])).
% 52.45/52.73  tff(1371,plain,
% 52.45/52.73      (sum(n6, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1370])).
% 52.45/52.73  tff(1372,plain,
% 52.45/52.73      (n17 = sum(n6, n11)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1088])).
% 52.45/52.73  tff(1373,plain,
% 52.45/52.73      (sum(n15, n4) = n19),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1374,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n15, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[306, 1251])).
% 52.45/52.73  tff(1375,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.73      inference(transitivity,[status(thm)],[1374, 1373])).
% 52.45/52.73  tff(1376,plain,
% 52.45/52.73      (sum(n2, n17) = n19),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1377,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 303])).
% 52.45/52.73  tff(1378,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.73      inference(transitivity,[status(thm)],[1377, 1376])).
% 52.45/52.73  tff(1379,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1378, 1375])).
% 52.45/52.73  tff(1380,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1379, 776, 1372, 1371])).
% 52.45/52.73  tff(1381,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1380])).
% 52.45/52.73  tff(1382,plain,((~(Y!0 = n16)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1383,plain,
% 52.45/52.73      (~(Y!0 = n16)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1382, 1247])).
% 52.45/52.73  tff(1384,plain,
% 52.45/52.73      (succ(n17) = n18),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1385,assumption,(Y!0 = n17), introduced(assumption)).
% 52.45/52.73  tff(1386,plain,
% 52.45/52.73      (succ(Y!0) = succ(n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1385])).
% 52.45/52.73  tff(1387,plain,
% 52.45/52.73      (succ(Y!0) = n18),
% 52.45/52.73      inference(transitivity,[status(thm)],[1386, 1384])).
% 52.45/52.73  tff(1388,plain,
% 52.45/52.73      (pred(n17) = n16),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1389,plain,
% 52.45/52.73      (pred(Y!0) = pred(n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1385])).
% 52.45/52.73  tff(1390,plain,
% 52.45/52.73      (pred(Y!0) = n16),
% 52.45/52.73      inference(transitivity,[status(thm)],[1389, 1388])).
% 52.45/52.73  tff(1391,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = sum(n16, n18)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1390, 1387])).
% 52.45/52.73  tff(1392,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = n13),
% 52.45/52.73      inference(transitivity,[status(thm)],[1391, 537])).
% 52.45/52.73  tff(1393,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 1392])).
% 52.45/52.73  tff(1394,plain,
% 52.45/52.73      (sum(n6, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1393])).
% 52.45/52.73  tff(1395,plain,
% 52.45/52.73      (n19 = sum(n6, n13)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1132])).
% 52.45/52.73  tff(1396,plain,
% 52.45/52.73      (sum(n16, n4) = n20),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1397,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n16, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1390, 1251])).
% 52.45/52.73  tff(1398,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.45/52.73      inference(transitivity,[status(thm)],[1397, 1396])).
% 52.45/52.73  tff(1399,plain,
% 52.45/52.73      (sum(n2, n18) = n20),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1400,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n18)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 1387])).
% 52.45/52.73  tff(1401,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.45/52.73      inference(transitivity,[status(thm)],[1400, 1399])).
% 52.45/52.73  tff(1402,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1401, 1398])).
% 52.45/52.73  tff(1403,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1402, 139, 1395, 1394])).
% 52.45/52.73  tff(1404,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1403])).
% 52.45/52.73  tff(1405,plain,((~(Y!0 = n17)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1406,plain,
% 52.45/52.73      (~(Y!0 = n17)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1405, 1247])).
% 52.45/52.73  tff(1407,assumption,(Y!0 = n12), introduced(assumption)).
% 52.45/52.73  tff(1408,plain,
% 52.45/52.73      (succ(Y!0) = succ(n12)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1407])).
% 52.45/52.73  tff(1409,plain,
% 52.45/52.73      (succ(Y!0) = n13),
% 52.45/52.73      inference(transitivity,[status(thm)],[1408, 98])).
% 52.45/52.73  tff(1410,plain,
% 52.45/52.73      (pred(Y!0) = pred(n12)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1407])).
% 52.45/52.73  tff(1411,plain,
% 52.45/52.73      (pred(Y!0) = n11),
% 52.45/52.73      inference(transitivity,[status(thm)],[1410, 336])).
% 52.45/52.73  tff(1412,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = sum(n11, n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1411, 1409])).
% 52.45/52.73  tff(1413,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = n3),
% 52.45/52.73      inference(transitivity,[status(thm)],[1412, 97])).
% 52.45/52.73  tff(1414,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n3)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 1413])).
% 52.45/52.73  tff(1415,plain,
% 52.45/52.73      (sum(n6, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1414])).
% 52.45/52.73  tff(1416,plain,
% 52.45/52.73      (sum(n6, n3) = n9),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1417,plain,
% 52.45/52.73      (n9 = sum(n6, n3)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1416])).
% 52.45/52.73  tff(1418,plain,
% 52.45/52.73      (sum(n11, n4) = n15),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1419,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n11, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1411, 1251])).
% 52.45/52.73  tff(1420,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.73      inference(transitivity,[status(thm)],[1419, 1418])).
% 52.45/52.73  tff(1421,plain,
% 52.45/52.73      (sum(n2, n13) = n15),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1422,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 1409])).
% 52.45/52.73  tff(1423,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.73      inference(transitivity,[status(thm)],[1422, 1421])).
% 52.45/52.73  tff(1424,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1423, 1420])).
% 52.45/52.73  tff(1425,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1424, 513, 1417, 1415])).
% 52.45/52.73  tff(1426,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1425])).
% 52.45/52.73  tff(1427,plain,((~(Y!0 = n12)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1428,plain,
% 52.45/52.73      (~(Y!0 = n12)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1427, 1247])).
% 52.45/52.73  tff(1429,assumption,(Y!0 = n10), introduced(assumption)).
% 52.45/52.73  tff(1430,plain,
% 52.45/52.73      (succ(Y!0) = succ(n10)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1429])).
% 52.45/52.73  tff(1431,plain,
% 52.45/52.73      (succ(Y!0) = n11),
% 52.45/52.73      inference(transitivity,[status(thm)],[1430, 237])).
% 52.45/52.73  tff(1432,plain,
% 52.45/52.73      (pred(Y!0) = pred(n10)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1429])).
% 52.45/52.73  tff(1433,plain,
% 52.45/52.73      (pred(Y!0) = n9),
% 52.45/52.73      inference(transitivity,[status(thm)],[1432, 240])).
% 52.45/52.73  tff(1434,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = sum(n9, n11)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1433, 1431])).
% 52.45/52.73  tff(1435,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = n20),
% 52.45/52.73      inference(transitivity,[status(thm)],[1434, 236])).
% 52.45/52.73  tff(1436,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 1435])).
% 52.45/52.73  tff(1437,plain,
% 52.45/52.73      (sum(n6, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1436])).
% 52.45/52.73  tff(1438,plain,
% 52.45/52.73      (sum(n6, n20) = n5),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1439,plain,
% 52.45/52.73      (n5 = sum(n6, n20)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1438])).
% 52.45/52.73  tff(1440,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n9, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1433, 1251])).
% 52.45/52.73  tff(1441,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.73      inference(transitivity,[status(thm)],[1440, 867])).
% 52.45/52.73  tff(1442,plain,
% 52.45/52.73      (sum(n2, n11) = n13),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1443,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n11)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 1431])).
% 52.45/52.73  tff(1444,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.73      inference(transitivity,[status(thm)],[1443, 1442])).
% 52.45/52.73  tff(1445,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1444, 1441])).
% 52.45/52.73  tff(1446,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1445, 51, 1439, 1437])).
% 52.45/52.73  tff(1447,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1446])).
% 52.45/52.73  tff(1448,plain,((~(Y!0 = n10)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1449,plain,
% 52.45/52.73      (~(Y!0 = n10)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1448, 1247])).
% 52.45/52.73  tff(1450,assumption,(Y!0 = n18), introduced(assumption)).
% 52.45/52.73  tff(1451,plain,
% 52.45/52.73      (succ(Y!0) = succ(n18)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1450])).
% 52.45/52.73  tff(1452,plain,
% 52.45/52.73      (succ(Y!0) = n19),
% 52.45/52.73      inference(transitivity,[status(thm)],[1451, 764])).
% 52.45/52.73  tff(1453,plain,
% 52.45/52.73      (pred(Y!0) = pred(n18)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1450])).
% 52.45/52.73  tff(1454,plain,
% 52.45/52.73      (pred(Y!0) = n17),
% 52.45/52.73      inference(transitivity,[status(thm)],[1453, 768])).
% 52.45/52.73  tff(1455,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = sum(n17, n19)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1454, 1452])).
% 52.45/52.73  tff(1456,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = n15),
% 52.45/52.73      inference(transitivity,[status(thm)],[1455, 763])).
% 52.45/52.73  tff(1457,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n15)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 1456])).
% 52.45/52.73  tff(1458,plain,
% 52.45/52.73      (sum(n6, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1457])).
% 52.45/52.73  tff(1459,plain,
% 52.45/52.73      (n0 = sum(n6, n15)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1176])).
% 52.45/52.73  tff(1460,plain,
% 52.45/52.73      (sum(n17, n4) = n0),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1461,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n17, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1454, 1251])).
% 52.45/52.73  tff(1462,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.45/52.73      inference(transitivity,[status(thm)],[1461, 1460])).
% 52.45/52.73  tff(1463,plain,
% 52.45/52.73      (sum(n2, n19) = n0),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1464,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n19)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 1452])).
% 52.45/52.73  tff(1465,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.45/52.73      inference(transitivity,[status(thm)],[1464, 1463])).
% 52.45/52.73  tff(1466,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1465, 1462])).
% 52.45/52.73  tff(1467,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1466, 75, 1459, 1458])).
% 52.45/52.73  tff(1468,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1467])).
% 52.45/52.73  tff(1469,plain,((~(Y!0 = n18)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1470,plain,
% 52.45/52.73      (~(Y!0 = n18)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1469, 1247])).
% 52.45/52.73  tff(1471,assumption,(Y!0 = n4), introduced(assumption)).
% 52.45/52.73  tff(1472,plain,
% 52.45/52.73      (succ(Y!0) = succ(n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1471])).
% 52.45/52.73  tff(1473,plain,
% 52.45/52.73      (succ(Y!0) = n5),
% 52.45/52.73      inference(transitivity,[status(thm)],[1472, 36])).
% 52.45/52.73  tff(1474,plain,
% 52.45/52.73      (pred(Y!0) = pred(n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1471])).
% 52.45/52.73  tff(1475,plain,
% 52.45/52.73      (pred(Y!0) = n3),
% 52.45/52.73      inference(transitivity,[status(thm)],[1474, 166])).
% 52.45/52.73  tff(1476,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = sum(n3, n5)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1475, 1473])).
% 52.45/52.73  tff(1477,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = n8),
% 52.45/52.73      inference(transitivity,[status(thm)],[1476, 35])).
% 52.45/52.73  tff(1478,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n8)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1256, 1477])).
% 52.45/52.73  tff(1479,plain,
% 52.45/52.73      (sum(n6, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1478])).
% 52.45/52.73  tff(1480,plain,
% 52.45/52.73      (n14 = sum(n6, n8)),
% 52.45/52.73      inference(symmetry,[status(thm)],[37])).
% 52.45/52.73  tff(1481,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n3, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1475, 1251])).
% 52.45/52.73  tff(1482,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.73      inference(transitivity,[status(thm)],[1481, 852])).
% 52.45/52.73  tff(1483,plain,
% 52.45/52.73      (sum(n2, n5) = n7),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1484,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n2, n5)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1254, 1473])).
% 52.45/52.73  tff(1485,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.73      inference(transitivity,[status(thm)],[1484, 1483])).
% 52.45/52.73  tff(1486,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1485, 1482])).
% 52.45/52.73  tff(1487,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1486, 405, 1480, 1479])).
% 52.45/52.73  tff(1488,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1487])).
% 52.45/52.73  tff(1489,plain,((~(Y!0 = n4)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1490,plain,
% 52.45/52.73      (~(Y!0 = n4)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1489, 1247])).
% 52.45/52.73  tff(1491,plain,
% 52.45/52.73      (sum(n18, n20) = n17),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1492,plain,
% 52.45/52.73      (succ(n19) = n20),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1493,assumption,(Y!0 = n19), introduced(assumption)).
% 52.45/52.73  tff(1494,plain,
% 52.45/52.73      (succ(Y!0) = succ(n19)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1493])).
% 52.45/52.73  tff(1495,plain,
% 52.45/52.73      (succ(Y!0) = n20),
% 52.45/52.73      inference(transitivity,[status(thm)],[1494, 1492])).
% 52.45/52.73  tff(1496,plain,
% 52.45/52.73      (pred(n19) = n18),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1497,plain,
% 52.45/52.73      (pred(Y!0) = pred(n19)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1493])).
% 52.45/52.73  tff(1498,plain,
% 52.45/52.73      (pred(Y!0) = n18),
% 52.45/52.73      inference(transitivity,[status(thm)],[1497, 1496])).
% 52.45/52.73  tff(1499,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = sum(n18, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 1495])).
% 52.45/52.73  tff(1500,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(Y!0)) = n17),
% 52.45/52.73      inference(transitivity,[status(thm)],[1499, 1491])).
% 52.45/52.73  tff(1501,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[187, 1500])).
% 52.45/52.73  tff(1502,plain,
% 52.45/52.73      (sum(n10, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1501])).
% 52.45/52.73  tff(1503,plain,
% 52.45/52.73      (sum(n10, n17) = n6),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1504,plain,
% 52.45/52.73      (n6 = sum(n10, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1503])).
% 52.45/52.73  tff(1505,plain,
% 52.45/52.73      (sum(n18, n6) = n3),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1506,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n6)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 101])).
% 52.45/52.73  tff(1507,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.73      inference(transitivity,[status(thm)],[1506, 1505])).
% 52.45/52.73  tff(1508,plain,
% 52.45/52.73      (sum(n4, n20) = n3),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1509,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n4, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[111, 1495])).
% 52.45/52.73  tff(1510,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.73      inference(transitivity,[status(thm)],[1509, 1508])).
% 52.45/52.73  tff(1511,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1510, 1507])).
% 52.45/52.73  tff(1512,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1511, 224, 1504, 1502])).
% 52.45/52.73  tff(1513,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1512])).
% 52.45/52.73  tff(1514,plain,((~(X!1 = n5)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1515,plain,
% 52.45/52.73      (~(X!1 = n5)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1514, 1493])).
% 52.45/52.73  tff(1516,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[937, 1500])).
% 52.45/52.73  tff(1517,plain,
% 52.45/52.73      (sum(n12, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1516])).
% 52.45/52.73  tff(1518,plain,
% 52.45/52.73      (sum(n12, n17) = n8),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1519,plain,
% 52.45/52.73      (n8 = sum(n12, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1518])).
% 52.45/52.73  tff(1520,plain,
% 52.45/52.73      (sum(n18, n7) = n4),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1521,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n7)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 933])).
% 52.45/52.73  tff(1522,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.45/52.73      inference(transitivity,[status(thm)],[1521, 1520])).
% 52.45/52.73  tff(1523,plain,
% 52.45/52.73      (sum(n5, n20) = n4),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1524,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n5, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[935, 1495])).
% 52.45/52.73  tff(1525,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.45/52.73      inference(transitivity,[status(thm)],[1524, 1523])).
% 52.45/52.73  tff(1526,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1525, 1522])).
% 52.45/52.73  tff(1527,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1526, 264, 1519, 1517])).
% 52.45/52.73  tff(1528,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1527])).
% 52.45/52.73  tff(1529,plain,((~(X!1 = n6)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1530,plain,
% 52.45/52.73      (~(X!1 = n6)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1529, 1493])).
% 52.45/52.73  tff(1531,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[46, 1500])).
% 52.45/52.73  tff(1532,plain,
% 52.45/52.73      (sum(n14, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1531])).
% 52.45/52.73  tff(1533,plain,
% 52.45/52.73      (sum(n14, n17) = n10),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1534,plain,
% 52.45/52.73      (n10 = sum(n14, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1533])).
% 52.45/52.73  tff(1535,plain,
% 52.45/52.73      (sum(n18, n8) = n5),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1536,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n8)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 41])).
% 52.45/52.73  tff(1537,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.45/52.73      inference(transitivity,[status(thm)],[1536, 1535])).
% 52.45/52.73  tff(1538,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n6, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[44, 1495])).
% 52.45/52.73  tff(1539,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.45/52.73      inference(transitivity,[status(thm)],[1538, 1438])).
% 52.45/52.73  tff(1540,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1539, 1537])).
% 52.45/52.73  tff(1541,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1540, 313, 1534, 1532])).
% 52.45/52.73  tff(1542,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1541])).
% 52.45/52.73  tff(1543,plain,((~(X!1 = n7)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1544,plain,
% 52.45/52.73      (~(X!1 = n7)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1543, 1493])).
% 52.45/52.73  tff(1545,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[534, 1500])).
% 52.45/52.73  tff(1546,plain,
% 52.45/52.73      (sum(n16, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1545])).
% 52.45/52.73  tff(1547,plain,
% 52.45/52.73      (sum(n16, n17) = n12),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1548,plain,
% 52.45/52.73      (n12 = sum(n16, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1547])).
% 52.45/52.73  tff(1549,plain,
% 52.45/52.73      (sum(n18, n9) = n6),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1550,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n9)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 529])).
% 52.45/52.73  tff(1551,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.45/52.73      inference(transitivity,[status(thm)],[1550, 1549])).
% 52.45/52.73  tff(1552,plain,
% 52.45/52.73      (sum(n7, n20) = n6),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1553,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n7, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[532, 1495])).
% 52.45/52.73  tff(1554,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.45/52.73      inference(transitivity,[status(thm)],[1553, 1552])).
% 52.45/52.73  tff(1555,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1554, 1551])).
% 52.45/52.73  tff(1556,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1555, 127, 1548, 1546])).
% 52.45/52.73  tff(1557,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1556])).
% 52.45/52.73  tff(1558,plain,((~(X!1 = n8)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1559,plain,
% 52.45/52.73      (~(X!1 = n8)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1558, 1493])).
% 52.45/52.73  tff(1560,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[804, 1500])).
% 52.45/52.73  tff(1561,plain,
% 52.45/52.73      (sum(n18, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1560])).
% 52.45/52.73  tff(1562,plain,
% 52.45/52.73      (sum(n18, n17) = n14),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1563,plain,
% 52.45/52.73      (n14 = sum(n18, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1562])).
% 52.45/52.73  tff(1564,plain,
% 52.45/52.73      (sum(n18, n10) = n7),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1565,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n10)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 800])).
% 52.45/52.73  tff(1566,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.73      inference(transitivity,[status(thm)],[1565, 1564])).
% 52.45/52.73  tff(1567,plain,
% 52.45/52.73      (sum(n8, n20) = n7),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1568,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n8, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[802, 1495])).
% 52.45/52.73  tff(1569,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.73      inference(transitivity,[status(thm)],[1568, 1567])).
% 52.45/52.73  tff(1570,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1569, 1566])).
% 52.45/52.73  tff(1571,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1570, 405, 1563, 1561])).
% 52.45/52.73  tff(1572,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1571])).
% 52.45/52.73  tff(1573,plain,((~(X!1 = n9)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1574,plain,
% 52.45/52.73      (~(X!1 = n9)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1573, 1493])).
% 52.45/52.73  tff(1575,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[244, 1500])).
% 52.45/52.73  tff(1576,plain,
% 52.45/52.73      (sum(n20, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1575])).
% 52.45/52.73  tff(1577,plain,
% 52.45/52.73      (sum(n20, n17) = n16),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1578,plain,
% 52.45/52.73      (n16 = sum(n20, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1577])).
% 52.45/52.73  tff(1579,plain,
% 52.45/52.73      (sum(n18, n11) = n8),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1580,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n11)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 239])).
% 52.45/52.73  tff(1581,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.45/52.73      inference(transitivity,[status(thm)],[1580, 1579])).
% 52.45/52.73  tff(1582,plain,
% 52.45/52.73      (sum(n9, n20) = n8),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1583,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n9, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[242, 1495])).
% 52.45/52.73  tff(1584,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.45/52.73      inference(transitivity,[status(thm)],[1583, 1582])).
% 52.45/52.73  tff(1585,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1584, 1581])).
% 52.45/52.73  tff(1586,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1585, 209, 1578, 1576])).
% 52.45/52.73  tff(1587,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1586])).
% 52.45/52.73  tff(1588,plain,((~(X!1 = n10)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1589,plain,
% 52.45/52.73      (~(X!1 = n10)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1588, 1493])).
% 52.45/52.73  tff(1590,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[433, 1500])).
% 52.45/52.73  tff(1591,plain,
% 52.45/52.73      (sum(n1, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1590])).
% 52.45/52.73  tff(1592,plain,
% 52.45/52.73      (sum(n1, n17) = n18),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1593,plain,
% 52.45/52.73      (n18 = sum(n1, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1592])).
% 52.45/52.73  tff(1594,plain,
% 52.45/52.73      (sum(n18, n12) = n9),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1595,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n12)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 428])).
% 52.45/52.73  tff(1596,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.45/52.73      inference(transitivity,[status(thm)],[1595, 1594])).
% 52.45/52.73  tff(1597,plain,
% 52.45/52.73      (sum(n10, n20) = n9),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1598,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n10, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[431, 1495])).
% 52.45/52.73  tff(1599,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.45/52.73      inference(transitivity,[status(thm)],[1598, 1597])).
% 52.45/52.73  tff(1600,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1599, 1596])).
% 52.45/52.73  tff(1601,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1600, 1315, 1593, 1591])).
% 52.45/52.73  tff(1602,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1601])).
% 52.45/52.73  tff(1603,plain,((~(X!1 = n11)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1604,plain,
% 52.45/52.73      (~(X!1 = n11)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1603, 1493])).
% 52.45/52.73  tff(1605,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[340, 1500])).
% 52.45/52.73  tff(1606,plain,
% 52.45/52.73      (sum(n3, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1605])).
% 52.45/52.73  tff(1607,plain,
% 52.45/52.73      (sum(n3, n17) = n20),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1608,plain,
% 52.45/52.73      (n20 = sum(n3, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1607])).
% 52.45/52.73  tff(1609,plain,
% 52.45/52.73      (sum(n18, n13) = n10),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1610,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 335])).
% 52.45/52.73  tff(1611,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.45/52.73      inference(transitivity,[status(thm)],[1610, 1609])).
% 52.45/52.73  tff(1612,plain,
% 52.45/52.73      (sum(n11, n20) = n10),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1613,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n11, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[338, 1495])).
% 52.45/52.73  tff(1614,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.45/52.73      inference(transitivity,[status(thm)],[1613, 1612])).
% 52.45/52.73  tff(1615,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1614, 1611])).
% 52.45/52.73  tff(1616,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1615, 1358, 1608, 1606])).
% 52.45/52.73  tff(1617,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1616])).
% 52.45/52.73  tff(1618,plain,((~(X!1 = n12)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1619,plain,
% 52.45/52.73      (~(X!1 = n12)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1618, 1493])).
% 52.45/52.73  tff(1620,assumption,(X!1 = n13), introduced(assumption)).
% 52.45/52.73  tff(1621,plain,
% 52.45/52.73      (succ(X!1) = succ(n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1620])).
% 52.45/52.73  tff(1622,plain,
% 52.45/52.73      (succ(X!1) = n14),
% 52.45/52.73      inference(transitivity,[status(thm)],[1621, 23])).
% 52.45/52.73  tff(1623,plain,
% 52.45/52.73      (pred(X!1) = pred(n13)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1620])).
% 52.45/52.73  tff(1624,plain,
% 52.45/52.73      (pred(X!1) = n12),
% 52.45/52.73      inference(transitivity,[status(thm)],[1623, 328])).
% 52.45/52.73  tff(1625,plain,
% 52.45/52.73      (sum(pred(X!1), succ(X!1)) = sum(n12, n14)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1624, 1622])).
% 52.45/52.73  tff(1626,plain,
% 52.45/52.73      (sum(pred(X!1), succ(X!1)) = n5),
% 52.45/52.73      inference(transitivity,[status(thm)],[1625, 22])).
% 52.45/52.73  tff(1627,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1626, 1500])).
% 52.45/52.73  tff(1628,plain,
% 52.45/52.73      (sum(n5, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1627])).
% 52.45/52.73  tff(1629,plain,
% 52.45/52.73      (sum(n5, n17) = n1),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1630,plain,
% 52.45/52.73      (n1 = sum(n5, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[1629])).
% 52.45/52.73  tff(1631,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n14)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 1622])).
% 52.45/52.73  tff(1632,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.73      inference(transitivity,[status(thm)],[1631, 1073])).
% 52.45/52.73  tff(1633,plain,
% 52.45/52.73      (sum(n12, n20) = n11),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1634,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n12, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1624, 1495])).
% 52.45/52.73  tff(1635,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.73      inference(transitivity,[status(thm)],[1634, 1633])).
% 52.45/52.73  tff(1636,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1635, 1632])).
% 52.45/52.73  tff(1637,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1636, 438, 1630, 1628])).
% 52.45/52.73  tff(1638,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1637])).
% 52.45/52.73  tff(1639,plain,((~(X!1 = n13)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.73  tff(1640,plain,
% 52.45/52.73      (~(X!1 = n13)),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[1639, 1493])).
% 52.45/52.73  tff(1641,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n17)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[915, 1500])).
% 52.45/52.73  tff(1642,plain,
% 52.45/52.73      (sum(n7, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(symmetry,[status(thm)],[1641])).
% 52.45/52.73  tff(1643,plain,
% 52.45/52.73      (n3 = sum(n7, n17)),
% 52.45/52.73      inference(symmetry,[status(thm)],[618])).
% 52.45/52.73  tff(1644,plain,
% 52.45/52.73      (sum(n18, n15) = n12),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1645,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = sum(n18, n15)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1498, 911])).
% 52.45/52.73  tff(1646,plain,
% 52.45/52.73      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.73      inference(transitivity,[status(thm)],[1645, 1644])).
% 52.45/52.73  tff(1647,plain,
% 52.45/52.73      (sum(n13, n20) = n12),
% 52.45/52.73      inference(and_elim,[status(thm)],[9])).
% 52.45/52.73  tff(1648,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = sum(n13, n20)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[913, 1495])).
% 52.45/52.73  tff(1649,plain,
% 52.45/52.73      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.73      inference(transitivity,[status(thm)],[1648, 1647])).
% 52.45/52.73  tff(1650,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.73      inference(monotonicity,[status(thm)],[1649, 1646])).
% 52.45/52.73  tff(1651,plain,
% 52.45/52.73      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.73      inference(transitivity,[status(thm)],[1650, 123, 1643, 1642])).
% 52.45/52.73  tff(1652,plain,
% 52.45/52.73      ($false),
% 52.45/52.73      inference(unit_resolution,[status(thm)],[60, 1651])).
% 52.45/52.74  tff(1653,plain,((~(X!1 = n14)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1654,plain,
% 52.45/52.74      (~(X!1 = n14)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1653, 1493])).
% 52.45/52.74  tff(1655,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n17)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[70, 1500])).
% 52.45/52.74  tff(1656,plain,
% 52.45/52.74      (sum(n9, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1655])).
% 52.45/52.74  tff(1657,plain,
% 52.45/52.74      (n5 = sum(n9, n17)),
% 52.45/52.74      inference(symmetry,[status(thm)],[317])).
% 52.45/52.74  tff(1658,plain,
% 52.45/52.74      (sum(n18, n16) = n13),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1659,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n18, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1498, 66])).
% 52.45/52.74  tff(1660,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.74      inference(transitivity,[status(thm)],[1659, 1658])).
% 52.45/52.74  tff(1661,plain,
% 52.45/52.74      (sum(n14, n20) = n13),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1662,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n14, n20)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[68, 1495])).
% 52.45/52.74  tff(1663,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.74      inference(transitivity,[status(thm)],[1662, 1661])).
% 52.45/52.74  tff(1664,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1663, 1660])).
% 52.45/52.74  tff(1665,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1664, 51, 1657, 1656])).
% 52.45/52.74  tff(1666,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1665])).
% 52.45/52.74  tff(1667,plain,((~(X!1 = n15)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1668,plain,
% 52.45/52.74      (~(X!1 = n15)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1667, 1493])).
% 52.45/52.74  tff(1669,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n17)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[170, 1500])).
% 52.45/52.74  tff(1670,plain,
% 52.45/52.74      (sum(n8, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1669])).
% 52.45/52.74  tff(1671,plain,
% 52.45/52.74      (sum(n8, n17) = n4),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1672,plain,
% 52.45/52.74      (n4 = sum(n8, n17)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1671])).
% 52.45/52.74  tff(1673,plain,
% 52.45/52.74      (sum(n18, n5) = n2),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1674,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n18, n5)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1498, 165])).
% 52.45/52.74  tff(1675,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.45/52.74      inference(transitivity,[status(thm)],[1674, 1673])).
% 52.45/52.74  tff(1676,plain,
% 52.45/52.74      (sum(n3, n20) = n2),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1677,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n3, n20)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[168, 1495])).
% 52.45/52.74  tff(1678,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.45/52.74      inference(transitivity,[status(thm)],[1677, 1676])).
% 52.45/52.74  tff(1679,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1678, 1675])).
% 52.45/52.74  tff(1680,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1679, 583, 1672, 1670])).
% 52.45/52.74  tff(1681,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1680])).
% 52.45/52.74  tff(1682,plain,((~(X!1 = n4)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1683,plain,
% 52.45/52.74      (~(X!1 = n4)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1682, 1493])).
% 52.45/52.74  tff(1684,assumption,(X!1 = n2), introduced(assumption)).
% 52.45/52.74  tff(1685,plain,
% 52.45/52.74      (succ(X!1) = succ(n2)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1684])).
% 52.45/52.74  tff(1686,plain,
% 52.45/52.74      (succ(X!1) = n3),
% 52.45/52.74      inference(transitivity,[status(thm)],[1685, 789])).
% 52.45/52.74  tff(1687,plain,
% 52.45/52.74      (pred(X!1) = pred(n2)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1684])).
% 52.45/52.74  tff(1688,plain,
% 52.45/52.74      (pred(X!1) = n1),
% 52.45/52.74      inference(transitivity,[status(thm)],[1687, 793])).
% 52.45/52.74  tff(1689,plain,
% 52.45/52.74      (sum(pred(X!1), succ(X!1)) = sum(n1, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1686])).
% 52.45/52.74  tff(1690,plain,
% 52.45/52.74      (sum(pred(X!1), succ(X!1)) = n4),
% 52.45/52.74      inference(transitivity,[status(thm)],[1689, 788])).
% 52.45/52.74  tff(1691,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n2)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 635])).
% 52.45/52.74  tff(1692,plain,
% 52.45/52.74      (sum(n4, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1691])).
% 52.45/52.74  tff(1693,plain,
% 52.45/52.74      (n6 = sum(n4, n2)),
% 52.45/52.74      inference(symmetry,[status(thm)],[722])).
% 52.45/52.74  tff(1694,plain,
% 52.45/52.74      (sum(n0, n3) = n3),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1695,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n0, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[633, 1686])).
% 52.45/52.74  tff(1696,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.74      inference(transitivity,[status(thm)],[1695, 1694])).
% 52.45/52.74  tff(1697,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n2)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 630])).
% 52.45/52.74  tff(1698,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.74      inference(transitivity,[status(thm)],[1697, 675])).
% 52.45/52.74  tff(1699,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1698, 1696])).
% 52.45/52.74  tff(1700,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1699, 224, 1693, 1692])).
% 52.45/52.74  tff(1701,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1700])).
% 52.45/52.74  tff(1702,plain,((~(Y!0 = n1)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1703,plain,
% 52.45/52.74      (~(Y!0 = n1)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1702, 1684])).
% 52.45/52.74  tff(1704,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n0)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 425])).
% 52.45/52.74  tff(1705,plain,
% 52.45/52.74      (sum(n4, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1704])).
% 52.45/52.74  tff(1706,plain,
% 52.45/52.74      (sum(n4, n0) = n4),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1707,plain,
% 52.45/52.74      (n4 = sum(n4, n0)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1706])).
% 52.45/52.74  tff(1708,plain,
% 52.45/52.74      (sum(n20, n3) = n2),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1709,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n20, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[423, 1686])).
% 52.45/52.74  tff(1710,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.45/52.74      inference(transitivity,[status(thm)],[1709, 1708])).
% 52.45/52.74  tff(1711,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n1)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 420])).
% 52.45/52.74  tff(1712,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.45/52.74      inference(transitivity,[status(thm)],[1711, 599])).
% 52.45/52.74  tff(1713,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1712, 1710])).
% 52.45/52.74  tff(1714,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1713, 583, 1707, 1705])).
% 52.45/52.74  tff(1715,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1714])).
% 52.45/52.74  tff(1716,plain,((~(Y!0 = n0)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1717,plain,
% 52.45/52.74      (~(Y!0 = n0)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1716, 1684])).
% 52.45/52.74  tff(1718,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n5)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 332])).
% 52.45/52.74  tff(1719,plain,
% 52.45/52.74      (sum(n4, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1718])).
% 52.45/52.74  tff(1720,plain,
% 52.45/52.74      (sum(n4, n5) = n9),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1721,plain,
% 52.45/52.74      (n9 = sum(n4, n5)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1720])).
% 52.45/52.74  tff(1722,plain,
% 52.45/52.74      (sum(n12, n3) = n15),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1723,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n12, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[330, 1686])).
% 52.45/52.74  tff(1724,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.74      inference(transitivity,[status(thm)],[1723, 1722])).
% 52.45/52.74  tff(1725,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n14)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 327])).
% 52.45/52.74  tff(1726,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.74      inference(transitivity,[status(thm)],[1725, 1101])).
% 52.45/52.74  tff(1727,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1726, 1724])).
% 52.45/52.74  tff(1728,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1727, 513, 1721, 1719])).
% 52.45/52.74  tff(1729,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1728])).
% 52.45/52.74  tff(1730,plain,((~(Y!0 = n13)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1731,plain,
% 52.45/52.74      (~(Y!0 = n13)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1730, 1684])).
% 52.45/52.74  tff(1732,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n18)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 160])).
% 52.45/52.74  tff(1733,plain,
% 52.45/52.74      (sum(n4, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1732])).
% 52.45/52.74  tff(1734,plain,
% 52.45/52.74      (sum(n4, n18) = n1),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1735,plain,
% 52.45/52.74      (n1 = sum(n4, n18)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1734])).
% 52.45/52.74  tff(1736,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n8, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[158, 1686])).
% 52.45/52.74  tff(1737,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.74      inference(transitivity,[status(thm)],[1736, 812])).
% 52.45/52.74  tff(1738,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n10)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 155])).
% 52.45/52.74  tff(1739,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.74      inference(transitivity,[status(thm)],[1738, 809])).
% 52.45/52.74  tff(1740,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1739, 1737])).
% 52.45/52.74  tff(1741,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1740, 438, 1735, 1733])).
% 52.45/52.74  tff(1742,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1741])).
% 52.45/52.74  tff(1743,plain,((~(Y!0 = n9)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1744,plain,
% 52.45/52.74      (~(Y!0 = n9)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1743, 1684])).
% 52.45/52.74  tff(1745,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n10)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 96])).
% 52.45/52.74  tff(1746,plain,
% 52.45/52.74      (sum(n4, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1745])).
% 52.45/52.74  tff(1747,plain,
% 52.45/52.74      (n14 = sum(n4, n10)),
% 52.45/52.74      inference(symmetry,[status(thm)],[196])).
% 52.45/52.74  tff(1748,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n4, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[94, 1686])).
% 52.45/52.74  tff(1749,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.74      inference(transitivity,[status(thm)],[1748, 901])).
% 52.45/52.74  tff(1750,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n6)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 91])).
% 52.45/52.74  tff(1751,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.74      inference(transitivity,[status(thm)],[1750, 898])).
% 52.45/52.74  tff(1752,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1751, 1749])).
% 52.45/52.74  tff(1753,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1752, 405, 1747, 1746])).
% 52.45/52.74  tff(1754,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1753])).
% 52.45/52.74  tff(1755,plain,((~(Y!0 = n5)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1756,plain,
% 52.45/52.74      (~(Y!0 = n5)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1755, 1684])).
% 52.45/52.74  tff(1757,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n12)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 34])).
% 52.45/52.74  tff(1758,plain,
% 52.45/52.74      (sum(n4, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1757])).
% 52.45/52.74  tff(1759,plain,
% 52.45/52.74      (sum(n4, n12) = n16),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1760,plain,
% 52.45/52.74      (n16 = sum(n4, n12)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1759])).
% 52.45/52.74  tff(1761,plain,
% 52.45/52.74      (sum(n5, n3) = n8),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1762,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n5, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[32, 1686])).
% 52.45/52.74  tff(1763,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.45/52.74      inference(transitivity,[status(thm)],[1762, 1761])).
% 52.45/52.74  tff(1764,plain,
% 52.45/52.74      (sum(n1, n7) = n8),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1765,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n7)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 29])).
% 52.45/52.74  tff(1766,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.45/52.74      inference(transitivity,[status(thm)],[1765, 1764])).
% 52.45/52.74  tff(1767,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1766, 1763])).
% 52.45/52.74  tff(1768,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1767, 209, 1760, 1758])).
% 52.45/52.74  tff(1769,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1768])).
% 52.45/52.74  tff(1770,plain,((~(Y!0 = n6)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1771,plain,
% 52.45/52.74      (~(Y!0 = n6)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1770, 1684])).
% 52.45/52.74  tff(1772,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n9)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 21])).
% 52.45/52.74  tff(1773,plain,
% 52.45/52.74      (sum(n4, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1772])).
% 52.45/52.74  tff(1774,plain,
% 52.45/52.74      (n13 = sum(n4, n9)),
% 52.45/52.74      inference(symmetry,[status(thm)],[554])).
% 52.45/52.74  tff(1775,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n14, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[19, 1686])).
% 52.45/52.74  tff(1776,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.74      inference(transitivity,[status(thm)],[1775, 872])).
% 52.45/52.74  tff(1777,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 16])).
% 52.45/52.74  tff(1778,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.74      inference(transitivity,[status(thm)],[1777, 869])).
% 52.45/52.74  tff(1779,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1778, 1776])).
% 52.45/52.74  tff(1780,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1779, 358, 1774, 1773])).
% 52.45/52.74  tff(1781,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1780])).
% 52.45/52.74  tff(1782,plain,((~(Y!0 = n15)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1783,plain,
% 52.45/52.74      (~(Y!0 = n15)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1782, 1684])).
% 52.45/52.74  tff(1784,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n7)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 283])).
% 52.45/52.74  tff(1785,plain,
% 52.45/52.74      (sum(n4, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1784])).
% 52.45/52.74  tff(1786,plain,
% 52.45/52.74      (n11 = sum(n4, n7)),
% 52.45/52.74      inference(symmetry,[status(thm)],[985])).
% 52.45/52.74  tff(1787,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n13, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[281, 1686])).
% 52.45/52.74  tff(1788,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.74      inference(transitivity,[status(thm)],[1787, 923])).
% 52.45/52.74  tff(1789,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n15)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 278])).
% 52.45/52.74  tff(1790,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.74      inference(transitivity,[status(thm)],[1789, 920])).
% 52.45/52.74  tff(1791,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1790, 1788])).
% 52.45/52.74  tff(1792,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1791, 208, 1786, 1785])).
% 52.45/52.74  tff(1793,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1792])).
% 52.45/52.74  tff(1794,plain,((~(Y!0 = n14)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1795,plain,
% 52.45/52.74      (~(Y!0 = n14)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1794, 1684])).
% 52.45/52.74  tff(1796,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n17)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 1500])).
% 52.45/52.74  tff(1797,plain,
% 52.45/52.74      (sum(n4, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1796])).
% 52.45/52.74  tff(1798,plain,
% 52.45/52.74      (sum(n4, n17) = n0),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1799,plain,
% 52.45/52.74      (n0 = sum(n4, n17)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1798])).
% 52.45/52.74  tff(1800,plain,
% 52.45/52.74      (sum(n18, n3) = n0),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1801,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n18, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1498, 1686])).
% 52.45/52.74  tff(1802,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.45/52.74      inference(transitivity,[status(thm)],[1801, 1800])).
% 52.45/52.74  tff(1803,plain,
% 52.45/52.74      (sum(n1, n20) = n0),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1804,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n20)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1495])).
% 52.45/52.74  tff(1805,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.45/52.74      inference(transitivity,[status(thm)],[1804, 1803])).
% 52.45/52.74  tff(1806,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1805, 1802])).
% 52.45/52.74  tff(1807,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1806, 75, 1799, 1797])).
% 52.45/52.74  tff(1808,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1807])).
% 52.45/52.74  tff(1809,plain,((~(Y!0 = n19)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1810,plain,
% 52.45/52.74      (~(Y!0 = n19)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1809, 1684])).
% 52.45/52.74  tff(1811,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n14)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 1055])).
% 52.45/52.74  tff(1812,plain,
% 52.45/52.74      (sum(n4, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1811])).
% 52.45/52.74  tff(1813,plain,
% 52.45/52.74      (n18 = sum(n4, n14)),
% 52.45/52.74      inference(symmetry,[status(thm)],[378])).
% 52.45/52.74  tff(1814,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n6, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1053, 1686])).
% 52.45/52.74  tff(1815,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.45/52.74      inference(transitivity,[status(thm)],[1814, 1416])).
% 52.45/52.74  tff(1816,plain,
% 52.45/52.74      (sum(n1, n8) = n9),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1817,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n8)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1051])).
% 52.45/52.74  tff(1818,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.45/52.74      inference(transitivity,[status(thm)],[1817, 1816])).
% 52.45/52.74  tff(1819,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1818, 1815])).
% 52.45/52.74  tff(1820,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1819, 1315, 1813, 1812])).
% 52.45/52.74  tff(1821,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1820])).
% 52.45/52.74  tff(1822,plain,((~(Y!0 = n7)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1823,plain,
% 52.45/52.74      (~(Y!0 = n7)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1822, 1684])).
% 52.45/52.74  tff(1824,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n11)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 308])).
% 52.45/52.74  tff(1825,plain,
% 52.45/52.74      (sum(n4, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1824])).
% 52.45/52.74  tff(1826,plain,
% 52.45/52.74      (sum(n4, n11) = n15),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1827,plain,
% 52.45/52.74      (n15 = sum(n4, n11)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1826])).
% 52.45/52.74  tff(1828,plain,
% 52.45/52.74      (sum(n15, n3) = n18),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1829,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n15, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[306, 1686])).
% 52.45/52.74  tff(1830,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.45/52.74      inference(transitivity,[status(thm)],[1829, 1828])).
% 52.45/52.74  tff(1831,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n17)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 303])).
% 52.45/52.74  tff(1832,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.45/52.74      inference(transitivity,[status(thm)],[1831, 1592])).
% 52.45/52.74  tff(1833,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1832, 1830])).
% 52.45/52.74  tff(1834,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1833, 374, 1827, 1825])).
% 52.45/52.74  tff(1835,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1834])).
% 52.45/52.74  tff(1836,plain,((~(Y!0 = n16)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1837,plain,
% 52.45/52.74      (~(Y!0 = n16)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1836, 1684])).
% 52.45/52.74  tff(1838,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n13)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 1392])).
% 52.45/52.74  tff(1839,plain,
% 52.45/52.74      (sum(n4, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1838])).
% 52.45/52.74  tff(1840,plain,
% 52.45/52.74      (sum(n4, n13) = n17),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1841,plain,
% 52.45/52.74      (n17 = sum(n4, n13)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1840])).
% 52.45/52.74  tff(1842,plain,
% 52.45/52.74      (sum(n16, n3) = n19),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1843,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n16, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1390, 1686])).
% 52.45/52.74  tff(1844,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.74      inference(transitivity,[status(thm)],[1843, 1842])).
% 52.45/52.74  tff(1845,plain,
% 52.45/52.74      (sum(n1, n18) = n19),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1846,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n18)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1387])).
% 52.45/52.74  tff(1847,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.74      inference(transitivity,[status(thm)],[1846, 1845])).
% 52.45/52.74  tff(1848,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1847, 1844])).
% 52.45/52.74  tff(1849,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1848, 776, 1841, 1839])).
% 52.45/52.74  tff(1850,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1849])).
% 52.45/52.74  tff(1851,plain,((~(Y!0 = n17)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1852,plain,
% 52.45/52.74      (~(Y!0 = n17)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1851, 1684])).
% 52.45/52.74  tff(1853,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 1413])).
% 52.45/52.74  tff(1854,plain,
% 52.45/52.74      (sum(n4, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1853])).
% 52.45/52.74  tff(1855,plain,
% 52.45/52.74      (n7 = sum(n4, n3)),
% 52.45/52.74      inference(symmetry,[status(thm)],[901])).
% 52.45/52.74  tff(1856,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n11, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1411, 1686])).
% 52.45/52.74  tff(1857,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.45/52.74      inference(transitivity,[status(thm)],[1856, 857])).
% 52.45/52.74  tff(1858,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n13)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1409])).
% 52.45/52.74  tff(1859,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.45/52.74      inference(transitivity,[status(thm)],[1858, 854])).
% 52.45/52.74  tff(1860,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1859, 1857])).
% 52.45/52.74  tff(1861,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1860, 192, 1855, 1854])).
% 52.45/52.74  tff(1862,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1861])).
% 52.45/52.74  tff(1863,plain,((~(Y!0 = n12)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1864,plain,
% 52.45/52.74      (~(Y!0 = n12)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1863, 1684])).
% 52.45/52.74  tff(1865,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n20)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 1435])).
% 52.45/52.74  tff(1866,plain,
% 52.45/52.74      (sum(n4, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1865])).
% 52.45/52.74  tff(1867,plain,
% 52.45/52.74      (n3 = sum(n4, n20)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1508])).
% 52.45/52.74  tff(1868,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n9, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1433, 1686])).
% 52.45/52.74  tff(1869,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.74      inference(transitivity,[status(thm)],[1868, 827])).
% 52.45/52.74  tff(1870,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n11)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1431])).
% 52.45/52.74  tff(1871,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.74      inference(transitivity,[status(thm)],[1870, 824])).
% 52.45/52.74  tff(1872,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1871, 1869])).
% 52.45/52.74  tff(1873,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1872, 123, 1867, 1866])).
% 52.45/52.74  tff(1874,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1873])).
% 52.45/52.74  tff(1875,plain,((~(Y!0 = n10)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1876,plain,
% 52.45/52.74      (~(Y!0 = n10)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1875, 1684])).
% 52.45/52.74  tff(1877,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n15)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1690, 1456])).
% 52.45/52.74  tff(1878,plain,
% 52.45/52.74      (sum(n4, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1877])).
% 52.45/52.74  tff(1879,plain,
% 52.45/52.74      (sum(n4, n15) = n19),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1880,plain,
% 52.45/52.74      (n19 = sum(n4, n15)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1879])).
% 52.45/52.74  tff(1881,plain,
% 52.45/52.74      (sum(n17, n3) = n20),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1882,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n17, n3)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1454, 1686])).
% 52.45/52.74  tff(1883,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.45/52.74      inference(transitivity,[status(thm)],[1882, 1881])).
% 52.45/52.74  tff(1884,plain,
% 52.45/52.74      (sum(n1, n19) = n20),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1885,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n1, n19)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1688, 1452])).
% 52.45/52.74  tff(1886,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.45/52.74      inference(transitivity,[status(thm)],[1885, 1884])).
% 52.45/52.74  tff(1887,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1886, 1883])).
% 52.45/52.74  tff(1888,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1887, 139, 1880, 1878])).
% 52.45/52.74  tff(1889,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1888])).
% 52.45/52.74  tff(1890,plain,((~(Y!0 = n18)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1891,plain,
% 52.45/52.74      (~(Y!0 = n18)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1890, 1684])).
% 52.45/52.74  tff(1892,assumption,(Y!0 = n8), introduced(assumption)).
% 52.45/52.74  tff(1893,plain,
% 52.45/52.74      (succ(Y!0) = succ(n8)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1892])).
% 52.45/52.74  tff(1894,plain,
% 52.45/52.74      (succ(Y!0) = n9),
% 52.45/52.74      inference(transitivity,[status(thm)],[1893, 527])).
% 52.45/52.74  tff(1895,plain,
% 52.45/52.74      (pred(Y!0) = pred(n8)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1892])).
% 52.45/52.74  tff(1896,plain,
% 52.45/52.74      (pred(Y!0) = n7),
% 52.45/52.74      inference(transitivity,[status(thm)],[1895, 530])).
% 52.45/52.74  tff(1897,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(Y!0)) = sum(n7, n9)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1896, 1894])).
% 52.45/52.74  tff(1898,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(Y!0)) = n16),
% 52.45/52.74      inference(transitivity,[status(thm)],[1897, 526])).
% 52.45/52.74  tff(1899,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[170, 1898])).
% 52.45/52.74  tff(1900,plain,
% 52.45/52.74      (sum(n8, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1899])).
% 52.45/52.74  tff(1901,plain,
% 52.45/52.74      (n3 = sum(n8, n16)),
% 52.45/52.74      inference(symmetry,[status(thm)],[225])).
% 52.45/52.74  tff(1902,plain,
% 52.45/52.74      (sum(n7, n5) = n12),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1903,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n7, n5)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1896, 165])).
% 52.45/52.74  tff(1904,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.74      inference(transitivity,[status(thm)],[1903, 1902])).
% 52.45/52.74  tff(1905,plain,
% 52.45/52.74      (sum(n3, n9) = n12),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1906,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n3, n9)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[168, 1894])).
% 52.45/52.74  tff(1907,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.74      inference(transitivity,[status(thm)],[1906, 1905])).
% 52.45/52.74  tff(1908,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1907, 1904])).
% 52.45/52.74  tff(1909,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1908, 123, 1901, 1900])).
% 52.45/52.74  tff(1910,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1909])).
% 52.45/52.74  tff(1911,plain,((~(X!1 = n4)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1912,plain,
% 52.45/52.74      (~(X!1 = n4)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1911, 1892])).
% 52.45/52.74  tff(1913,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[187, 1898])).
% 52.45/52.74  tff(1914,plain,
% 52.45/52.74      (sum(n10, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1913])).
% 52.45/52.74  tff(1915,plain,
% 52.45/52.74      (sum(n10, n16) = n5),
% 52.45/52.74      inference(and_elim,[status(thm)],[9])).
% 52.45/52.74  tff(1916,plain,
% 52.45/52.74      (n5 = sum(n10, n16)),
% 52.45/52.74      inference(symmetry,[status(thm)],[1915])).
% 52.45/52.74  tff(1917,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n7, n6)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1896, 101])).
% 52.45/52.74  tff(1918,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.45/52.74      inference(transitivity,[status(thm)],[1917, 557])).
% 52.45/52.74  tff(1919,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n4, n9)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[111, 1894])).
% 52.45/52.74  tff(1920,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.45/52.74      inference(transitivity,[status(thm)],[1919, 554])).
% 52.45/52.74  tff(1921,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1920, 1918])).
% 52.45/52.74  tff(1922,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1921, 51, 1916, 1914])).
% 52.45/52.74  tff(1923,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1922])).
% 52.45/52.74  tff(1924,plain,((~(X!1 = n5)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1925,plain,
% 52.45/52.74      (~(X!1 = n5)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1924, 1892])).
% 52.45/52.74  tff(1926,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[937, 1898])).
% 52.45/52.74  tff(1927,plain,
% 52.45/52.74      (sum(n12, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(symmetry,[status(thm)],[1926])).
% 52.45/52.74  tff(1928,plain,
% 52.45/52.74      (n7 = sum(n12, n16)),
% 52.45/52.74      inference(symmetry,[status(thm)],[406])).
% 52.45/52.74  tff(1929,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = sum(n7, n7)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1896, 933])).
% 52.45/52.74  tff(1930,plain,
% 52.45/52.74      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.45/52.74      inference(transitivity,[status(thm)],[1929, 405])).
% 52.45/52.74  tff(1931,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = sum(n5, n9)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[935, 1894])).
% 52.45/52.74  tff(1932,plain,
% 52.45/52.74      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.45/52.74      inference(transitivity,[status(thm)],[1931, 569])).
% 52.45/52.74  tff(1933,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[1932, 1930])).
% 52.45/52.74  tff(1934,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.74      inference(transitivity,[status(thm)],[1933, 192, 1928, 1927])).
% 52.45/52.74  tff(1935,plain,
% 52.45/52.74      ($false),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[60, 1934])).
% 52.45/52.74  tff(1936,plain,((~(X!1 = n6)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.74  tff(1937,plain,
% 52.45/52.74      (~(X!1 = n6)),
% 52.45/52.74      inference(unit_resolution,[status(thm)],[1936, 1892])).
% 52.45/52.74  tff(1938,plain,
% 52.45/52.74      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n16)),
% 52.45/52.74      inference(monotonicity,[status(thm)],[46, 1898])).
% 52.45/52.74  tff(1939,plain,
% 52.45/52.74      (sum(n14, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[1938])).
% 52.45/52.75  tff(1940,plain,
% 52.45/52.75      (n9 = sum(n14, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[12])).
% 52.45/52.75  tff(1941,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n8)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 41])).
% 52.45/52.75  tff(1942,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.75      inference(transitivity,[status(thm)],[1941, 1063])).
% 52.45/52.75  tff(1943,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n6, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[44, 1894])).
% 52.45/52.75  tff(1944,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.75      inference(transitivity,[status(thm)],[1943, 1060])).
% 52.45/52.75  tff(1945,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1944, 1942])).
% 52.45/52.75  tff(1946,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[1945, 513, 1940, 1939])).
% 52.45/52.75  tff(1947,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 1946])).
% 52.45/52.75  tff(1948,plain,((~(X!1 = n7)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(1949,plain,
% 52.45/52.75      (~(X!1 = n7)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[1948, 1892])).
% 52.45/52.75  tff(1950,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 529])).
% 52.45/52.75  tff(1951,plain,
% 52.45/52.75      (pred(n8) = pred(Y!0)),
% 52.45/52.75      inference(symmetry,[status(thm)],[1895])).
% 52.45/52.75  tff(1952,plain,
% 52.45/52.75      (pred(X!1) = pred(Y!0)),
% 52.45/52.75      inference(transitivity,[status(thm)],[531, 1951])).
% 52.45/52.75  tff(1953,plain,
% 52.45/52.75      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1952])).
% 52.45/52.75  tff(1954,plain,
% 52.45/52.75      (sum(pred(X!1), succ(X!1)) = n16),
% 52.45/52.75      inference(transitivity,[status(thm)],[1953, 1950, 526])).
% 52.45/52.75  tff(1955,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1954, 1898])).
% 52.45/52.75  tff(1956,plain,
% 52.45/52.75      (sum(n16, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[1955])).
% 52.45/52.75  tff(1957,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.45/52.75      inference(transitivity,[status(thm)],[1950, 526])).
% 52.45/52.75  tff(1958,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n7, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[532, 1894])).
% 52.45/52.75  tff(1959,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.45/52.75      inference(transitivity,[status(thm)],[1958, 526])).
% 52.45/52.75  tff(1960,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1959, 1957])).
% 52.45/52.75  tff(1961,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[1960, 1956])).
% 52.45/52.75  tff(1962,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 1961])).
% 52.45/52.75  tff(1963,plain,((~(X!1 = n8)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(1964,plain,
% 52.45/52.75      (~(X!1 = n8)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[1963, 1892])).
% 52.45/52.75  tff(1965,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[804, 1898])).
% 52.45/52.75  tff(1966,plain,
% 52.45/52.75      (sum(n18, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[1965])).
% 52.45/52.75  tff(1967,plain,
% 52.45/52.75      (n13 = sum(n18, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[1658])).
% 52.45/52.75  tff(1968,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n10)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 800])).
% 52.45/52.75  tff(1969,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.75      inference(transitivity,[status(thm)],[1968, 542])).
% 52.45/52.75  tff(1970,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n8, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[802, 1894])).
% 52.45/52.75  tff(1971,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.75      inference(transitivity,[status(thm)],[1970, 539])).
% 52.45/52.75  tff(1972,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1971, 1969])).
% 52.45/52.75  tff(1973,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[1972, 358, 1967, 1966])).
% 52.45/52.75  tff(1974,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 1973])).
% 52.45/52.75  tff(1975,plain,((~(X!1 = n9)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(1976,plain,
% 52.45/52.75      (~(X!1 = n9)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[1975, 1892])).
% 52.45/52.75  tff(1977,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[244, 1898])).
% 52.45/52.75  tff(1978,plain,
% 52.45/52.75      (sum(n20, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[1977])).
% 52.45/52.75  tff(1979,plain,
% 52.45/52.75      (n15 = sum(n20, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[514])).
% 52.45/52.75  tff(1980,plain,
% 52.45/52.75      (sum(n7, n11) = n18),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(1981,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n11)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 239])).
% 52.45/52.75  tff(1982,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.45/52.75      inference(transitivity,[status(thm)],[1981, 1980])).
% 52.45/52.75  tff(1983,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n9, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[242, 1894])).
% 52.45/52.75  tff(1984,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.45/52.75      inference(transitivity,[status(thm)],[1983, 1315])).
% 52.45/52.75  tff(1985,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1984, 1982])).
% 52.45/52.75  tff(1986,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[1985, 374, 1979, 1978])).
% 52.45/52.75  tff(1987,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 1986])).
% 52.45/52.75  tff(1988,plain,((~(X!1 = n10)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(1989,plain,
% 52.45/52.75      (~(X!1 = n10)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[1988, 1892])).
% 52.45/52.75  tff(1990,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[433, 1898])).
% 52.45/52.75  tff(1991,plain,
% 52.45/52.75      (sum(n1, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[1990])).
% 52.45/52.75  tff(1992,plain,
% 52.45/52.75      (n17 = sum(n1, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[869])).
% 52.45/52.75  tff(1993,plain,
% 52.45/52.75      (sum(n7, n12) = n19),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(1994,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n12)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 428])).
% 52.45/52.75  tff(1995,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.75      inference(transitivity,[status(thm)],[1994, 1993])).
% 52.45/52.75  tff(1996,plain,
% 52.45/52.75      (sum(n10, n9) = n19),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(1997,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n10, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[431, 1894])).
% 52.45/52.75  tff(1998,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.75      inference(transitivity,[status(thm)],[1997, 1996])).
% 52.45/52.75  tff(1999,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1998, 1995])).
% 52.45/52.75  tff(2000,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[1999, 776, 1992, 1991])).
% 52.45/52.75  tff(2001,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2000])).
% 52.45/52.75  tff(2002,plain,((~(X!1 = n11)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2003,plain,
% 52.45/52.75      (~(X!1 = n11)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2002, 1892])).
% 52.45/52.75  tff(2004,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[340, 1898])).
% 52.45/52.75  tff(2005,plain,
% 52.45/52.75      (sum(n3, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2004])).
% 52.45/52.75  tff(2006,plain,
% 52.45/52.75      (sum(n3, n16) = n19),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2007,plain,
% 52.45/52.75      (n19 = sum(n3, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2006])).
% 52.45/52.75  tff(2008,plain,
% 52.45/52.75      (sum(n7, n13) = n20),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2009,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n13)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 335])).
% 52.45/52.75  tff(2010,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.45/52.75      inference(transitivity,[status(thm)],[2009, 2008])).
% 52.45/52.75  tff(2011,plain,
% 52.45/52.75      (sum(n11, n9) = n20),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2012,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n11, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[338, 1894])).
% 52.45/52.75  tff(2013,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.45/52.75      inference(transitivity,[status(thm)],[2012, 2011])).
% 52.45/52.75  tff(2014,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2013, 2010])).
% 52.45/52.75  tff(2015,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2014, 139, 2007, 2005])).
% 52.45/52.75  tff(2016,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2015])).
% 52.45/52.75  tff(2017,plain,((~(X!1 = n12)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2018,plain,
% 52.45/52.75      (~(X!1 = n12)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2017, 1892])).
% 52.45/52.75  tff(2019,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1626, 1898])).
% 52.45/52.75  tff(2020,plain,
% 52.45/52.75      (sum(n5, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2019])).
% 52.45/52.75  tff(2021,plain,
% 52.45/52.75      (n0 = sum(n5, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[76])).
% 52.45/52.75  tff(2022,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n14)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 1622])).
% 52.45/52.75  tff(2023,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.45/52.75      inference(transitivity,[status(thm)],[2022, 1174])).
% 52.45/52.75  tff(2024,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n12, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1624, 1894])).
% 52.45/52.75  tff(2025,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.45/52.75      inference(transitivity,[status(thm)],[2024, 1009])).
% 52.45/52.75  tff(2026,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2025, 2023])).
% 52.45/52.75  tff(2027,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2026, 75, 2021, 2020])).
% 52.45/52.75  tff(2028,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2027])).
% 52.45/52.75  tff(2029,plain,((~(X!1 = n13)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2030,plain,
% 52.45/52.75      (~(X!1 = n13)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2029, 1892])).
% 52.45/52.75  tff(2031,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[915, 1898])).
% 52.45/52.75  tff(2032,plain,
% 52.45/52.75      (sum(n7, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2031])).
% 52.45/52.75  tff(2033,plain,
% 52.45/52.75      (n2 = sum(n7, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[587])).
% 52.45/52.75  tff(2034,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n15)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 911])).
% 52.45/52.75  tff(2035,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.45/52.75      inference(transitivity,[status(thm)],[2034, 603])).
% 52.45/52.75  tff(2036,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n13, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[913, 1894])).
% 52.45/52.75  tff(2037,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.45/52.75      inference(transitivity,[status(thm)],[2036, 600])).
% 52.45/52.75  tff(2038,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2037, 2035])).
% 52.45/52.75  tff(2039,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2038, 599, 2033, 2032])).
% 52.45/52.75  tff(2040,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2039])).
% 52.45/52.75  tff(2041,plain,((~(X!1 = n14)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2042,plain,
% 52.45/52.75      (~(X!1 = n14)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2041, 1892])).
% 52.45/52.75  tff(2043,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[70, 1898])).
% 52.45/52.75  tff(2044,plain,
% 52.45/52.75      (sum(n9, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2043])).
% 52.45/52.75  tff(2045,plain,
% 52.45/52.75      (n4 = sum(n9, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[268])).
% 52.45/52.75  tff(2046,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 66])).
% 52.45/52.75  tff(2047,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.45/52.75      inference(transitivity,[status(thm)],[2046, 587])).
% 52.45/52.75  tff(2048,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n14, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[68, 1894])).
% 52.45/52.75  tff(2049,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.45/52.75      inference(transitivity,[status(thm)],[2048, 584])).
% 52.45/52.75  tff(2050,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2049, 2047])).
% 52.45/52.75  tff(2051,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2050, 583, 2045, 2044])).
% 52.45/52.75  tff(2052,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2051])).
% 52.45/52.75  tff(2053,plain,((~(X!1 = n15)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2054,plain,
% 52.45/52.75      (~(X!1 = n15)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2053, 1892])).
% 52.45/52.75  tff(2055,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1256, 1898])).
% 52.45/52.75  tff(2056,plain,
% 52.45/52.75      (sum(n6, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2055])).
% 52.45/52.75  tff(2057,plain,
% 52.45/52.75      (n1 = sum(n6, n16)),
% 52.45/52.75      inference(symmetry,[status(thm)],[1118])).
% 52.45/52.75  tff(2058,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n7, n4)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1896, 1251])).
% 52.45/52.75  tff(2059,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.75      inference(transitivity,[status(thm)],[2058, 918])).
% 52.45/52.75  tff(2060,plain,
% 52.45/52.75      (sum(n2, n9) = n11),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2061,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n2, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[1254, 1894])).
% 52.45/52.75  tff(2062,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.75      inference(transitivity,[status(thm)],[2061, 2060])).
% 52.45/52.75  tff(2063,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2062, 2059])).
% 52.45/52.75  tff(2064,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2063, 438, 2057, 2056])).
% 52.45/52.75  tff(2065,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2064])).
% 52.45/52.75  tff(2066,plain,((~(X!1 = n3)) | (~(Y!0 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2067,plain,
% 52.45/52.75      (~(X!1 = n3)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2066, 1892])).
% 52.45/52.75  tff(2068,assumption,(X!1 = n17), introduced(assumption)).
% 52.45/52.75  tff(2069,plain,
% 52.45/52.75      (succ(X!1) = succ(n17)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2068])).
% 52.45/52.75  tff(2070,plain,
% 52.45/52.75      (succ(X!1) = n18),
% 52.45/52.75      inference(transitivity,[status(thm)],[2069, 1384])).
% 52.45/52.75  tff(2071,plain,
% 52.45/52.75      (pred(X!1) = pred(n17)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2068])).
% 52.45/52.75  tff(2072,plain,
% 52.45/52.75      (pred(X!1) = n16),
% 52.45/52.75      inference(transitivity,[status(thm)],[2071, 1388])).
% 52.45/52.75  tff(2073,plain,
% 52.45/52.75      (sum(pred(X!1), succ(X!1)) = sum(n16, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 2070])).
% 52.45/52.75  tff(2074,plain,
% 52.45/52.75      (sum(pred(X!1), succ(X!1)) = n13),
% 52.45/52.75      inference(transitivity,[status(thm)],[2073, 537])).
% 52.45/52.75  tff(2075,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n4)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 797])).
% 52.45/52.75  tff(2076,plain,
% 52.45/52.75      (sum(n13, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2075])).
% 52.45/52.75  tff(2077,plain,
% 52.45/52.75      (n17 = sum(n13, n4)),
% 52.45/52.75      inference(symmetry,[status(thm)],[1344])).
% 52.45/52.75  tff(2078,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n1, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[795, 2070])).
% 52.45/52.75  tff(2079,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.45/52.75      inference(transitivity,[status(thm)],[2078, 1845])).
% 52.45/52.75  tff(2080,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n3)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 792])).
% 52.45/52.75  tff(2081,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.45/52.75      inference(transitivity,[status(thm)],[2080, 1842])).
% 52.45/52.75  tff(2082,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2081, 2079])).
% 52.45/52.75  tff(2083,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2082, 776, 2077, 2076])).
% 52.45/52.75  tff(2084,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2083])).
% 52.45/52.75  tff(2085,plain,((~(Y!0 = n2)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2086,plain,
% 52.45/52.75      (~(Y!0 = n2)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2085, 2068])).
% 52.45/52.75  tff(2087,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n2)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 635])).
% 52.45/52.75  tff(2088,plain,
% 52.45/52.75      (sum(n13, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2087])).
% 52.45/52.75  tff(2089,plain,
% 52.45/52.75      (sum(n13, n2) = n15),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2090,plain,
% 52.45/52.75      (n15 = sum(n13, n2)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2089])).
% 52.45/52.75  tff(2091,plain,
% 52.45/52.75      (sum(n0, n18) = n18),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2092,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n0, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[633, 2070])).
% 52.45/52.75  tff(2093,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.45/52.75      inference(transitivity,[status(thm)],[2092, 2091])).
% 52.45/52.75  tff(2094,plain,
% 52.45/52.75      (sum(n16, n2) = n18),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2095,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n2)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 630])).
% 52.45/52.75  tff(2096,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.45/52.75      inference(transitivity,[status(thm)],[2095, 2094])).
% 52.45/52.75  tff(2097,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2096, 2093])).
% 52.45/52.75  tff(2098,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2097, 374, 2090, 2088])).
% 52.45/52.75  tff(2099,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2098])).
% 52.45/52.75  tff(2100,plain,((~(Y!0 = n1)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2101,plain,
% 52.45/52.75      (~(Y!0 = n1)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2100, 2068])).
% 52.45/52.75  tff(2102,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n0)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 425])).
% 52.45/52.75  tff(2103,plain,
% 52.45/52.75      (sum(n13, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2102])).
% 52.45/52.75  tff(2104,plain,
% 52.45/52.75      (sum(n13, n0) = n13),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2105,plain,
% 52.45/52.75      (n13 = sum(n13, n0)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2104])).
% 52.45/52.75  tff(2106,plain,
% 52.45/52.75      (sum(n20, n18) = n17),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2107,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n20, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[423, 2070])).
% 52.45/52.75  tff(2108,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.45/52.75      inference(transitivity,[status(thm)],[2107, 2106])).
% 52.45/52.75  tff(2109,plain,
% 52.45/52.75      (sum(n16, n1) = n17),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2110,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n1)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 420])).
% 52.45/52.75  tff(2111,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.45/52.75      inference(transitivity,[status(thm)],[2110, 2109])).
% 52.45/52.75  tff(2112,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2111, 2108])).
% 52.45/52.75  tff(2113,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2112, 358, 2105, 2103])).
% 52.45/52.75  tff(2114,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2113])).
% 52.45/52.75  tff(2115,plain,((~(Y!0 = n0)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2116,plain,
% 52.45/52.75      (~(Y!0 = n0)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2115, 2068])).
% 52.45/52.75  tff(2117,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n5)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 332])).
% 52.45/52.75  tff(2118,plain,
% 52.45/52.75      (sum(n13, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2117])).
% 52.45/52.75  tff(2119,plain,
% 52.45/52.75      (sum(n13, n5) = n18),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2120,plain,
% 52.45/52.75      (n18 = sum(n13, n5)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2119])).
% 52.45/52.75  tff(2121,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n12, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[330, 2070])).
% 52.45/52.75  tff(2122,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.45/52.75      inference(transitivity,[status(thm)],[2121, 968])).
% 52.45/52.75  tff(2123,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n14)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 327])).
% 52.45/52.75  tff(2124,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.45/52.75      inference(transitivity,[status(thm)],[2123, 1058])).
% 52.45/52.75  tff(2125,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2124, 2122])).
% 52.45/52.75  tff(2126,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2125, 1315, 2120, 2118])).
% 52.45/52.75  tff(2127,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2126])).
% 52.45/52.75  tff(2128,plain,((~(Y!0 = n13)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2129,plain,
% 52.45/52.75      (~(Y!0 = n13)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2128, 2068])).
% 52.45/52.75  tff(2130,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 160])).
% 52.45/52.75  tff(2131,plain,
% 52.45/52.75      (sum(n13, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2130])).
% 52.45/52.75  tff(2132,plain,
% 52.45/52.75      (sum(n13, n18) = n10),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2133,plain,
% 52.45/52.75      (n10 = sum(n13, n18)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2132])).
% 52.45/52.75  tff(2134,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n8, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[158, 2070])).
% 52.45/52.75  tff(2135,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.45/52.75      inference(transitivity,[status(thm)],[2134, 173])).
% 52.45/52.75  tff(2136,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n10)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 155])).
% 52.45/52.75  tff(2137,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.45/52.75      inference(transitivity,[status(thm)],[2136, 552])).
% 52.45/52.75  tff(2138,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2137, 2135])).
% 52.45/52.75  tff(2139,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2138, 313, 2133, 2131])).
% 52.45/52.75  tff(2140,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2139])).
% 52.45/52.75  tff(2141,plain,((~(Y!0 = n9)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2142,plain,
% 52.45/52.75      (~(Y!0 = n9)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2141, 2068])).
% 52.45/52.75  tff(2143,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n10)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 96])).
% 52.45/52.75  tff(2144,plain,
% 52.45/52.75      (sum(n13, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2143])).
% 52.45/52.75  tff(2145,plain,
% 52.45/52.75      (sum(n13, n10) = n2),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2146,plain,
% 52.45/52.75      (n2 = sum(n13, n10)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2145])).
% 52.45/52.75  tff(2147,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n4, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[94, 2070])).
% 52.45/52.75  tff(2148,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.45/52.75      inference(transitivity,[status(thm)],[2147, 1734])).
% 52.45/52.75  tff(2149,plain,
% 52.45/52.75      (sum(n16, n6) = n1),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2150,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n6)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 91])).
% 52.45/52.75  tff(2151,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.45/52.75      inference(transitivity,[status(thm)],[2150, 2149])).
% 52.45/52.75  tff(2152,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2151, 2148])).
% 52.45/52.75  tff(2153,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2152, 599, 2146, 2144])).
% 52.45/52.75  tff(2154,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2153])).
% 52.45/52.75  tff(2155,plain,((~(Y!0 = n5)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2156,plain,
% 52.45/52.75      (~(Y!0 = n5)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2155, 2068])).
% 52.45/52.75  tff(2157,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n12)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 34])).
% 52.45/52.75  tff(2158,plain,
% 52.45/52.75      (sum(n13, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2157])).
% 52.45/52.75  tff(2159,plain,
% 52.45/52.75      (sum(n13, n12) = n4),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2160,plain,
% 52.45/52.75      (n4 = sum(n13, n12)),
% 52.45/52.75      inference(symmetry,[status(thm)],[2159])).
% 52.45/52.75  tff(2161,plain,
% 52.45/52.75      (sum(n5, n18) = n2),
% 52.45/52.75      inference(and_elim,[status(thm)],[9])).
% 52.45/52.75  tff(2162,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n5, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[32, 2070])).
% 52.45/52.75  tff(2163,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.45/52.75      inference(transitivity,[status(thm)],[2162, 2161])).
% 52.45/52.75  tff(2164,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n7)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 29])).
% 52.45/52.75  tff(2165,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.45/52.75      inference(transitivity,[status(thm)],[2164, 597])).
% 52.45/52.75  tff(2166,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2165, 2163])).
% 52.45/52.75  tff(2167,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(transitivity,[status(thm)],[2166, 583, 2160, 2158])).
% 52.45/52.75  tff(2168,plain,
% 52.45/52.75      ($false),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[60, 2167])).
% 52.45/52.75  tff(2169,plain,((~(Y!0 = n6)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.75  tff(2170,plain,
% 52.45/52.75      (~(Y!0 = n6)),
% 52.45/52.75      inference(unit_resolution,[status(thm)],[2169, 2068])).
% 52.45/52.75  tff(2171,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n9)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2074, 21])).
% 52.45/52.75  tff(2172,plain,
% 52.45/52.75      (sum(n13, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.75      inference(symmetry,[status(thm)],[2171])).
% 52.45/52.75  tff(2173,plain,
% 52.45/52.75      (n1 = sum(n13, n9)),
% 52.45/52.75      inference(symmetry,[status(thm)],[600])).
% 52.45/52.75  tff(2174,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = sum(n14, n18)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[19, 2070])).
% 52.45/52.75  tff(2175,plain,
% 52.45/52.75      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.75      inference(transitivity,[status(thm)],[2174, 206])).
% 52.45/52.75  tff(2176,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = sum(n16, n16)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2072, 16])).
% 52.45/52.75  tff(2177,plain,
% 52.45/52.75      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.75      inference(transitivity,[status(thm)],[2176, 208])).
% 52.45/52.75  tff(2178,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.75      inference(monotonicity,[status(thm)],[2177, 2175])).
% 52.45/52.75  tff(2179,plain,
% 52.45/52.75      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2178, 438, 2173, 2172])).
% 52.45/52.76  tff(2180,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2179])).
% 52.45/52.76  tff(2181,plain,((~(Y!0 = n15)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2182,plain,
% 52.45/52.76      (~(Y!0 = n15)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2181, 2068])).
% 52.45/52.76  tff(2183,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n17)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 1500])).
% 52.45/52.76  tff(2184,plain,
% 52.45/52.76      (sum(n13, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2183])).
% 52.45/52.76  tff(2185,plain,
% 52.45/52.76      (sum(n13, n17) = n9),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2186,plain,
% 52.45/52.76      (n9 = sum(n13, n17)),
% 52.45/52.76      inference(symmetry,[status(thm)],[2185])).
% 52.45/52.76  tff(2187,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n18, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[1498, 2070])).
% 52.45/52.76  tff(2188,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.45/52.76      inference(transitivity,[status(thm)],[2187, 374])).
% 52.45/52.76  tff(2189,plain,
% 52.45/52.76      (sum(n16, n20) = n15),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2190,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n20)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1495])).
% 52.45/52.76  tff(2191,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.45/52.76      inference(transitivity,[status(thm)],[2190, 2189])).
% 52.45/52.76  tff(2192,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2191, 2188])).
% 52.45/52.76  tff(2193,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2192, 513, 2186, 2184])).
% 52.45/52.76  tff(2194,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2193])).
% 52.45/52.76  tff(2195,plain,((~(Y!0 = n19)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2196,plain,
% 52.45/52.76      (~(Y!0 = n19)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2195, 2068])).
% 52.45/52.76  tff(2197,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n7)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 283])).
% 52.45/52.76  tff(2198,plain,
% 52.45/52.76      (sum(n13, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2197])).
% 52.45/52.76  tff(2199,plain,
% 52.45/52.76      (n20 = sum(n13, n7)),
% 52.45/52.76      inference(symmetry,[status(thm)],[1023])).
% 52.45/52.76  tff(2200,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n13, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[281, 2070])).
% 52.45/52.76  tff(2201,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.45/52.76      inference(transitivity,[status(thm)],[2200, 2132])).
% 52.45/52.76  tff(2202,plain,
% 52.45/52.76      (sum(n16, n15) = n10),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2203,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n15)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 278])).
% 52.45/52.76  tff(2204,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.45/52.76      inference(transitivity,[status(thm)],[2203, 2202])).
% 52.45/52.76  tff(2205,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2204, 2201])).
% 52.45/52.76  tff(2206,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2205, 1358, 2199, 2198])).
% 52.45/52.76  tff(2207,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2206])).
% 52.45/52.76  tff(2208,plain,((~(Y!0 = n14)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2209,plain,
% 52.45/52.76      (~(Y!0 = n14)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2208, 2068])).
% 52.45/52.76  tff(2210,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n14)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 1055])).
% 52.45/52.76  tff(2211,plain,
% 52.45/52.76      (sum(n13, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2210])).
% 52.45/52.76  tff(2212,plain,
% 52.45/52.76      (sum(n13, n14) = n6),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2213,plain,
% 52.45/52.76      (n6 = sum(n13, n14)),
% 52.45/52.76      inference(symmetry,[status(thm)],[2212])).
% 52.45/52.76  tff(2214,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n6, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[1053, 2070])).
% 52.45/52.76  tff(2215,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.45/52.76      inference(transitivity,[status(thm)],[2214, 1287])).
% 52.45/52.76  tff(2216,plain,
% 52.45/52.76      (sum(n16, n8) = n3),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2217,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n8)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1051])).
% 52.45/52.76  tff(2218,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.45/52.76      inference(transitivity,[status(thm)],[2217, 2216])).
% 52.45/52.76  tff(2219,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2218, 2215])).
% 52.45/52.76  tff(2220,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2219, 224, 2213, 2211])).
% 52.45/52.76  tff(2221,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2220])).
% 52.45/52.76  tff(2222,plain,((~(Y!0 = n7)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2223,plain,
% 52.45/52.76      (~(Y!0 = n7)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2222, 2068])).
% 52.45/52.76  tff(2224,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n11)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 308])).
% 52.45/52.76  tff(2225,plain,
% 52.45/52.76      (sum(n13, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2224])).
% 52.45/52.76  tff(2226,plain,
% 52.45/52.76      (n3 = sum(n13, n11)),
% 52.45/52.76      inference(symmetry,[status(thm)],[288])).
% 52.45/52.76  tff(2227,plain,
% 52.45/52.76      (sum(n15, n18) = n12),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2228,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n15, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[306, 2070])).
% 52.45/52.76  tff(2229,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.76      inference(transitivity,[status(thm)],[2228, 2227])).
% 52.45/52.76  tff(2230,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n17)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 303])).
% 52.45/52.76  tff(2231,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.76      inference(transitivity,[status(thm)],[2230, 1547])).
% 52.45/52.76  tff(2232,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2231, 2229])).
% 52.45/52.76  tff(2233,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2232, 123, 2226, 2225])).
% 52.45/52.76  tff(2234,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2233])).
% 52.45/52.76  tff(2235,plain,((~(Y!0 = n16)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2236,plain,
% 52.45/52.76      (~(Y!0 = n16)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2235, 2068])).
% 52.45/52.76  tff(2237,plain,
% 52.45/52.76      (succ(n17) = succ(X!1)),
% 52.45/52.76      inference(symmetry,[status(thm)],[2069])).
% 52.45/52.76  tff(2238,plain,
% 52.45/52.76      (succ(Y!0) = succ(X!1)),
% 52.45/52.76      inference(transitivity,[status(thm)],[1386, 2237])).
% 52.45/52.76  tff(2239,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2238])).
% 52.45/52.76  tff(2240,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1387])).
% 52.45/52.76  tff(2241,plain,
% 52.45/52.76      (sum(n16, n18) = sum(pred(X!1), succ(Y!0))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2240])).
% 52.45/52.76  tff(2242,plain,
% 52.45/52.76      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2073, 2241])).
% 52.45/52.76  tff(2243,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2242, 2239])).
% 52.45/52.76  tff(2244,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2243])).
% 52.45/52.76  tff(2245,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2244])).
% 52.45/52.76  tff(2246,plain,((~(Y!0 = n17)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2247,plain,
% 52.45/52.76      (~(Y!0 = n17)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2246, 2068])).
% 52.45/52.76  tff(2248,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n3)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 1413])).
% 52.45/52.76  tff(2249,plain,
% 52.45/52.76      (sum(n13, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2248])).
% 52.45/52.76  tff(2250,plain,
% 52.45/52.76      (n16 = sum(n13, n3)),
% 52.45/52.76      inference(symmetry,[status(thm)],[923])).
% 52.45/52.76  tff(2251,plain,
% 52.45/52.76      (sum(n11, n18) = n8),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2252,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n11, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[1411, 2070])).
% 52.45/52.76  tff(2253,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.45/52.76      inference(transitivity,[status(thm)],[2252, 2251])).
% 52.45/52.76  tff(2254,plain,
% 52.45/52.76      (sum(n16, n13) = n8),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2255,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n13)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1409])).
% 52.45/52.76  tff(2256,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.45/52.76      inference(transitivity,[status(thm)],[2255, 2254])).
% 52.45/52.76  tff(2257,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2256, 2253])).
% 52.45/52.76  tff(2258,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2257, 209, 2250, 2249])).
% 52.45/52.76  tff(2259,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2258])).
% 52.45/52.76  tff(2260,plain,((~(Y!0 = n12)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2261,plain,
% 52.45/52.76      (~(Y!0 = n12)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2260, 2068])).
% 52.45/52.76  tff(2262,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n20)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 1435])).
% 52.45/52.76  tff(2263,plain,
% 52.45/52.76      (sum(n13, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2262])).
% 52.45/52.76  tff(2264,plain,
% 52.45/52.76      (n12 = sum(n13, n20)),
% 52.45/52.76      inference(symmetry,[status(thm)],[1647])).
% 52.45/52.76  tff(2265,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n9, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[1433, 2070])).
% 52.45/52.76  tff(2266,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.45/52.76      inference(transitivity,[status(thm)],[2265, 222])).
% 52.45/52.76  tff(2267,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n11)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1431])).
% 52.45/52.76  tff(2268,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.45/52.76      inference(transitivity,[status(thm)],[2267, 613])).
% 52.45/52.76  tff(2269,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2268, 2266])).
% 52.45/52.76  tff(2270,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2269, 127, 2264, 2263])).
% 52.45/52.76  tff(2271,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2270])).
% 52.45/52.76  tff(2272,plain,((~(Y!0 = n10)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2273,plain,
% 52.45/52.76      (~(Y!0 = n10)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2272, 2068])).
% 52.45/52.76  tff(2274,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n16)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 1898])).
% 52.45/52.76  tff(2275,plain,
% 52.45/52.76      (sum(n13, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2274])).
% 52.45/52.76  tff(2276,plain,
% 52.45/52.76      (sum(n13, n16) = n8),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2277,plain,
% 52.45/52.76      (n8 = sum(n13, n16)),
% 52.45/52.76      inference(symmetry,[status(thm)],[2276])).
% 52.45/52.76  tff(2278,plain,
% 52.45/52.76      (sum(n7, n18) = n4),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2279,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n7, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[1896, 2070])).
% 52.45/52.76  tff(2280,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.45/52.76      inference(transitivity,[status(thm)],[2279, 2278])).
% 52.45/52.76  tff(2281,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n9)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1894])).
% 52.45/52.76  tff(2282,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.45/52.76      inference(transitivity,[status(thm)],[2281, 581])).
% 52.45/52.76  tff(2283,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2282, 2280])).
% 52.45/52.76  tff(2284,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2283, 264, 2277, 2275])).
% 52.45/52.76  tff(2285,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2284])).
% 52.45/52.76  tff(2286,plain,((~(Y!0 = n8)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2287,plain,
% 52.45/52.76      (~(Y!0 = n8)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2286, 2068])).
% 52.45/52.76  tff(2288,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n8)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2074, 1477])).
% 52.45/52.76  tff(2289,plain,
% 52.45/52.76      (sum(n13, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2288])).
% 52.45/52.76  tff(2290,plain,
% 52.45/52.76      (n0 = sum(n13, n8)),
% 52.45/52.76      inference(symmetry,[status(thm)],[1179])).
% 52.45/52.76  tff(2291,plain,
% 52.45/52.76      (sum(n3, n18) = n0),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2292,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n3, n18)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[1475, 2070])).
% 52.45/52.76  tff(2293,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.45/52.76      inference(transitivity,[status(thm)],[2292, 2291])).
% 52.45/52.76  tff(2294,plain,
% 52.45/52.76      (sum(n16, n5) = n0),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2295,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n16, n5)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2072, 1473])).
% 52.45/52.76  tff(2296,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.45/52.76      inference(transitivity,[status(thm)],[2295, 2294])).
% 52.45/52.76  tff(2297,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2296, 2293])).
% 52.45/52.76  tff(2298,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2297, 75, 2290, 2289])).
% 52.45/52.76  tff(2299,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2298])).
% 52.45/52.76  tff(2300,plain,((~(Y!0 = n4)) | (~(X!1 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2301,plain,
% 52.45/52.76      (~(Y!0 = n4)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2300, 2068])).
% 52.45/52.76  tff(2302,assumption,(Y!0 = n3), introduced(assumption)).
% 52.45/52.76  tff(2303,plain,
% 52.45/52.76      (succ(Y!0) = succ(n3)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2302])).
% 52.45/52.76  tff(2304,plain,
% 52.45/52.76      (succ(Y!0) = n4),
% 52.45/52.76      inference(transitivity,[status(thm)],[2303, 1249])).
% 52.45/52.76  tff(2305,plain,
% 52.45/52.76      (pred(Y!0) = pred(n3)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2302])).
% 52.45/52.76  tff(2306,plain,
% 52.45/52.76      (pred(Y!0) = n2),
% 52.45/52.76      inference(transitivity,[status(thm)],[2305, 1252])).
% 52.45/52.76  tff(2307,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(Y!0)) = sum(n2, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 2304])).
% 52.45/52.76  tff(2308,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(Y!0)) = n6),
% 52.45/52.76      inference(transitivity,[status(thm)],[2307, 1248])).
% 52.45/52.76  tff(2309,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[170, 2308])).
% 52.45/52.76  tff(2310,plain,
% 52.45/52.76      (sum(n8, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2309])).
% 52.45/52.76  tff(2311,plain,
% 52.45/52.76      (n14 = sum(n8, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[193])).
% 52.45/52.76  tff(2312,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n5)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 165])).
% 52.45/52.76  tff(2313,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.45/52.76      inference(transitivity,[status(thm)],[2312, 1483])).
% 52.45/52.76  tff(2314,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n3, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[168, 2304])).
% 52.45/52.76  tff(2315,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.45/52.76      inference(transitivity,[status(thm)],[2314, 852])).
% 52.45/52.76  tff(2316,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2315, 2313])).
% 52.45/52.76  tff(2317,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2316, 405, 2311, 2310])).
% 52.45/52.76  tff(2318,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2317])).
% 52.45/52.76  tff(2319,plain,((~(X!1 = n4)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2320,plain,
% 52.45/52.76      (~(X!1 = n4)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2319, 2302])).
% 52.45/52.76  tff(2321,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[187, 2308])).
% 52.45/52.76  tff(2322,plain,
% 52.45/52.76      (sum(n10, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2321])).
% 52.45/52.76  tff(2323,plain,
% 52.45/52.76      (sum(n10, n6) = n16),
% 52.45/52.76      inference(and_elim,[status(thm)],[9])).
% 52.45/52.76  tff(2324,plain,
% 52.45/52.76      (n16 = sum(n10, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[2323])).
% 52.45/52.76  tff(2325,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 101])).
% 52.45/52.76  tff(2326,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.45/52.76      inference(transitivity,[status(thm)],[2325, 1304])).
% 52.45/52.76  tff(2327,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n4, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[111, 2304])).
% 52.45/52.76  tff(2328,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.45/52.76      inference(transitivity,[status(thm)],[2327, 264])).
% 52.45/52.76  tff(2329,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2328, 2326])).
% 52.45/52.76  tff(2330,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2329, 209, 2324, 2322])).
% 52.45/52.76  tff(2331,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2330])).
% 52.45/52.76  tff(2332,plain,((~(X!1 = n5)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2333,plain,
% 52.45/52.76      (~(X!1 = n5)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2332, 2302])).
% 52.45/52.76  tff(2334,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[937, 2308])).
% 52.45/52.76  tff(2335,plain,
% 52.45/52.76      (sum(n12, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2334])).
% 52.45/52.76  tff(2336,plain,
% 52.45/52.76      (n18 = sum(n12, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[375])).
% 52.45/52.76  tff(2337,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n7)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 933])).
% 52.45/52.76  tff(2338,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.45/52.76      inference(transitivity,[status(thm)],[2337, 1319])).
% 52.45/52.76  tff(2339,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n5, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[935, 2304])).
% 52.45/52.76  tff(2340,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.45/52.76      inference(transitivity,[status(thm)],[2339, 1316])).
% 52.45/52.76  tff(2341,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2340, 2338])).
% 52.45/52.76  tff(2342,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2341, 1315, 2336, 2335])).
% 52.45/52.76  tff(2343,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2342])).
% 52.45/52.76  tff(2344,plain,((~(X!1 = n6)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2345,plain,
% 52.45/52.76      (~(X!1 = n6)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2344, 2302])).
% 52.45/52.76  tff(2346,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[46, 2308])).
% 52.45/52.76  tff(2347,plain,
% 52.45/52.76      (sum(n14, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2346])).
% 52.45/52.76  tff(2348,plain,
% 52.45/52.76      (n20 = sum(n14, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[143])).
% 52.45/52.76  tff(2349,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n8)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 41])).
% 52.45/52.76  tff(2350,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.45/52.76      inference(transitivity,[status(thm)],[2349, 1362])).
% 52.45/52.76  tff(2351,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n6, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[44, 2304])).
% 52.45/52.76  tff(2352,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.45/52.76      inference(transitivity,[status(thm)],[2351, 1359])).
% 52.45/52.76  tff(2353,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2352, 2350])).
% 52.45/52.76  tff(2354,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2353, 1358, 2348, 2347])).
% 52.45/52.76  tff(2355,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2354])).
% 52.45/52.76  tff(2356,plain,((~(X!1 = n7)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2357,plain,
% 52.45/52.76      (~(X!1 = n7)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2356, 2302])).
% 52.45/52.76  tff(2358,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[534, 2308])).
% 52.45/52.76  tff(2359,plain,
% 52.45/52.76      (sum(n16, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2358])).
% 52.45/52.76  tff(2360,plain,
% 52.45/52.76      (n1 = sum(n16, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[2149])).
% 52.45/52.76  tff(2361,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n9)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 529])).
% 52.45/52.76  tff(2362,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.45/52.76      inference(transitivity,[status(thm)],[2361, 2060])).
% 52.45/52.76  tff(2363,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n7, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[532, 2304])).
% 52.45/52.76  tff(2364,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.45/52.76      inference(transitivity,[status(thm)],[2363, 918])).
% 52.45/52.76  tff(2365,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2364, 2362])).
% 52.45/52.76  tff(2366,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2365, 438, 2360, 2359])).
% 52.45/52.76  tff(2367,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2366])).
% 52.45/52.76  tff(2368,plain,((~(X!1 = n8)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2369,plain,
% 52.45/52.76      (~(X!1 = n8)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2368, 2302])).
% 52.45/52.76  tff(2370,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[804, 2308])).
% 52.45/52.76  tff(2371,plain,
% 52.45/52.76      (sum(n18, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2370])).
% 52.45/52.76  tff(2372,plain,
% 52.45/52.76      (n3 = sum(n18, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[1505])).
% 52.45/52.76  tff(2373,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n10)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2306, 800])).
% 52.45/52.76  tff(2374,plain,
% 52.45/52.76      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.45/52.76      inference(transitivity,[status(thm)],[2373, 1291])).
% 52.45/52.76  tff(2375,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n8, n4)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[802, 2304])).
% 52.45/52.76  tff(2376,plain,
% 52.45/52.76      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.45/52.76      inference(transitivity,[status(thm)],[2375, 882])).
% 52.45/52.76  tff(2377,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[2376, 2374])).
% 52.45/52.76  tff(2378,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(transitivity,[status(thm)],[2377, 123, 2372, 2371])).
% 52.45/52.76  tff(2379,plain,
% 52.45/52.76      ($false),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[60, 2378])).
% 52.45/52.76  tff(2380,plain,((~(X!1 = n9)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.45/52.76  tff(2381,plain,
% 52.45/52.76      (~(X!1 = n9)),
% 52.45/52.76      inference(unit_resolution,[status(thm)],[2380, 2302])).
% 52.45/52.76  tff(2382,plain,
% 52.45/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n6)),
% 52.45/52.76      inference(monotonicity,[status(thm)],[244, 2308])).
% 52.45/52.76  tff(2383,plain,
% 52.45/52.76      (sum(n20, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.45/52.76      inference(symmetry,[status(thm)],[2382])).
% 52.45/52.76  tff(2384,plain,
% 52.45/52.76      (n5 = sum(n20, n6)),
% 52.45/52.76      inference(symmetry,[status(thm)],[483])).
% 52.53/52.76  tff(2385,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n11)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2306, 239])).
% 52.53/52.76  tff(2386,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.53/52.76      inference(transitivity,[status(thm)],[2385, 1442])).
% 52.53/52.76  tff(2387,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n9, n4)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[242, 2304])).
% 52.53/52.76  tff(2388,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.53/52.76      inference(transitivity,[status(thm)],[2387, 867])).
% 52.53/52.76  tff(2389,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2388, 2386])).
% 52.53/52.76  tff(2390,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(transitivity,[status(thm)],[2389, 51, 2384, 2383])).
% 52.53/52.76  tff(2391,plain,
% 52.53/52.76      ($false),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[60, 2390])).
% 52.53/52.76  tff(2392,plain,((~(X!1 = n10)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.76  tff(2393,plain,
% 52.53/52.76      (~(X!1 = n10)),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[2392, 2302])).
% 52.53/52.76  tff(2394,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n6)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[433, 2308])).
% 52.53/52.76  tff(2395,plain,
% 52.53/52.76      (sum(n1, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(symmetry,[status(thm)],[2394])).
% 52.53/52.76  tff(2396,plain,
% 52.53/52.76      (n7 = sum(n1, n6)),
% 52.53/52.76      inference(symmetry,[status(thm)],[898])).
% 52.53/52.76  tff(2397,plain,
% 52.53/52.76      (sum(n2, n12) = n14),
% 52.53/52.76      inference(and_elim,[status(thm)],[9])).
% 52.53/52.76  tff(2398,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n12)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2306, 428])).
% 52.53/52.76  tff(2399,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.53/52.76      inference(transitivity,[status(thm)],[2398, 2397])).
% 52.53/52.76  tff(2400,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n10, n4)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[431, 2304])).
% 52.53/52.76  tff(2401,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.53/52.76      inference(transitivity,[status(thm)],[2400, 896])).
% 52.53/52.76  tff(2402,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2401, 2399])).
% 52.53/52.76  tff(2403,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(transitivity,[status(thm)],[2402, 192, 2396, 2395])).
% 52.53/52.76  tff(2404,plain,
% 52.53/52.76      ($false),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[60, 2403])).
% 52.53/52.76  tff(2405,plain,((~(X!1 = n11)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.76  tff(2406,plain,
% 52.53/52.76      (~(X!1 = n11)),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[2405, 2302])).
% 52.53/52.76  tff(2407,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n6)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[340, 2308])).
% 52.53/52.76  tff(2408,plain,
% 52.53/52.76      (sum(n3, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(symmetry,[status(thm)],[2407])).
% 52.53/52.76  tff(2409,plain,
% 52.53/52.76      (sum(n3, n6) = n9),
% 52.53/52.76      inference(and_elim,[status(thm)],[9])).
% 52.53/52.76  tff(2410,plain,
% 52.53/52.76      (n9 = sum(n3, n6)),
% 52.53/52.76      inference(symmetry,[status(thm)],[2409])).
% 52.53/52.76  tff(2411,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n13)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2306, 335])).
% 52.53/52.76  tff(2412,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.53/52.76      inference(transitivity,[status(thm)],[2411, 1421])).
% 52.53/52.76  tff(2413,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n11, n4)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[338, 2304])).
% 52.53/52.76  tff(2414,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.53/52.76      inference(transitivity,[status(thm)],[2413, 1418])).
% 52.53/52.76  tff(2415,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2414, 2412])).
% 52.53/52.76  tff(2416,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(transitivity,[status(thm)],[2415, 513, 2410, 2408])).
% 52.53/52.76  tff(2417,plain,
% 52.53/52.76      ($false),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[60, 2416])).
% 52.53/52.76  tff(2418,plain,((~(X!1 = n12)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.76  tff(2419,plain,
% 52.53/52.76      (~(X!1 = n12)),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[2418, 2302])).
% 52.53/52.76  tff(2420,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n6)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[1626, 2308])).
% 52.53/52.76  tff(2421,plain,
% 52.53/52.76      (sum(n5, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(symmetry,[status(thm)],[2420])).
% 52.53/52.76  tff(2422,plain,
% 52.53/52.76      (n11 = sum(n5, n6)),
% 52.53/52.76      inference(symmetry,[status(thm)],[988])).
% 52.53/52.76  tff(2423,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n14)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2306, 1622])).
% 52.53/52.76  tff(2424,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.53/52.76      inference(transitivity,[status(thm)],[2423, 1277])).
% 52.53/52.76  tff(2425,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n12, n4)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[1624, 2304])).
% 52.53/52.76  tff(2426,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.53/52.76      inference(transitivity,[status(thm)],[2425, 1274])).
% 52.53/52.76  tff(2427,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2426, 2424])).
% 52.53/52.76  tff(2428,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(transitivity,[status(thm)],[2427, 208, 2422, 2421])).
% 52.53/52.76  tff(2429,plain,
% 52.53/52.76      ($false),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[60, 2428])).
% 52.53/52.76  tff(2430,plain,((~(X!1 = n13)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.76  tff(2431,plain,
% 52.53/52.76      (~(X!1 = n13)),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[2430, 2302])).
% 52.53/52.76  tff(2432,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n6)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[915, 2308])).
% 52.53/52.76  tff(2433,plain,
% 52.53/52.76      (sum(n7, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(symmetry,[status(thm)],[2432])).
% 52.53/52.76  tff(2434,plain,
% 52.53/52.76      (n13 = sum(n7, n6)),
% 52.53/52.76      inference(symmetry,[status(thm)],[557])).
% 52.53/52.76  tff(2435,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n15)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2306, 911])).
% 52.53/52.76  tff(2436,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.53/52.76      inference(transitivity,[status(thm)],[2435, 1347])).
% 52.53/52.76  tff(2437,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n13, n4)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[913, 2304])).
% 52.53/52.76  tff(2438,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.53/52.76      inference(transitivity,[status(thm)],[2437, 1344])).
% 52.53/52.76  tff(2439,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2438, 2436])).
% 52.53/52.76  tff(2440,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(transitivity,[status(thm)],[2439, 358, 2434, 2433])).
% 52.53/52.76  tff(2441,plain,
% 52.53/52.76      ($false),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[60, 2440])).
% 52.53/52.76  tff(2442,plain,((~(X!1 = n14)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.76  tff(2443,plain,
% 52.53/52.76      (~(X!1 = n14)),
% 52.53/52.76      inference(unit_resolution,[status(thm)],[2442, 2302])).
% 52.53/52.76  tff(2444,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n6)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[70, 2308])).
% 52.53/52.76  tff(2445,plain,
% 52.53/52.76      (sum(n9, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.76      inference(symmetry,[status(thm)],[2444])).
% 52.53/52.76  tff(2446,plain,
% 52.53/52.76      (sum(n9, n6) = n15),
% 52.53/52.76      inference(and_elim,[status(thm)],[9])).
% 52.53/52.76  tff(2447,plain,
% 52.53/52.76      (n15 = sum(n9, n6)),
% 52.53/52.76      inference(symmetry,[status(thm)],[2446])).
% 52.53/52.76  tff(2448,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = sum(n2, n16)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[2306, 66])).
% 52.53/52.76  tff(2449,plain,
% 52.53/52.76      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.53/52.76      inference(transitivity,[status(thm)],[2448, 1333])).
% 52.53/52.76  tff(2450,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = sum(n14, n4)),
% 52.53/52.76      inference(monotonicity,[status(thm)],[68, 2304])).
% 52.53/52.76  tff(2451,plain,
% 52.53/52.76      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.53/52.76      inference(transitivity,[status(thm)],[2450, 1330])).
% 52.53/52.76  tff(2452,plain,
% 52.53/52.76      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2451, 2449])).
% 52.53/52.77  tff(2453,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2452, 374, 2447, 2445])).
% 52.53/52.77  tff(2454,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2453])).
% 52.53/52.77  tff(2455,plain,((~(X!1 = n15)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2456,plain,
% 52.53/52.77      (~(X!1 = n15)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2455, 2302])).
% 52.53/52.77  tff(2457,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2074, 2308])).
% 52.53/52.77  tff(2458,plain,
% 52.53/52.77      (sum(n13, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2457])).
% 52.53/52.77  tff(2459,plain,
% 52.53/52.77      (sum(n13, n6) = n19),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2460,plain,
% 52.53/52.77      (n19 = sum(n13, n6)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2459])).
% 52.53/52.77  tff(2461,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n2, n18)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2306, 2070])).
% 52.53/52.77  tff(2462,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.53/52.77      inference(transitivity,[status(thm)],[2461, 1399])).
% 52.53/52.77  tff(2463,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n16, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2072, 2304])).
% 52.53/52.77  tff(2464,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.53/52.77      inference(transitivity,[status(thm)],[2463, 1396])).
% 52.53/52.77  tff(2465,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2464, 2462])).
% 52.53/52.77  tff(2466,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2465, 139, 2460, 2458])).
% 52.53/52.77  tff(2467,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2466])).
% 52.53/52.77  tff(2468,plain,((~(X!1 = n17)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2469,plain,
% 52.53/52.77      (~(X!1 = n17)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2468, 2302])).
% 52.53/52.77  tff(2470,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[642, 2308])).
% 52.53/52.77  tff(2471,plain,
% 52.53/52.77      (sum(n11, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2470])).
% 52.53/52.77  tff(2472,plain,
% 52.53/52.77      (sum(n11, n6) = n17),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2473,plain,
% 52.53/52.77      (n17 = sum(n11, n6)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2472])).
% 52.53/52.77  tff(2474,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n2, n17)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2306, 638])).
% 52.53/52.77  tff(2475,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.53/52.77      inference(transitivity,[status(thm)],[2474, 1376])).
% 52.53/52.77  tff(2476,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n15, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[640, 2304])).
% 52.53/52.77  tff(2477,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.53/52.77      inference(transitivity,[status(thm)],[2476, 1373])).
% 52.53/52.77  tff(2478,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2477, 2475])).
% 52.53/52.77  tff(2479,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2478, 776, 2473, 2471])).
% 52.53/52.77  tff(2480,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2479])).
% 52.53/52.77  tff(2481,plain,((~(X!1 = n16)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2482,plain,
% 52.53/52.77      (~(X!1 = n16)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2481, 2302])).
% 52.53/52.77  tff(2483,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[772, 2308])).
% 52.53/52.77  tff(2484,plain,
% 52.53/52.77      (sum(n15, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2483])).
% 52.53/52.77  tff(2485,plain,
% 52.53/52.77      (sum(n15, n6) = n0),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2486,plain,
% 52.53/52.77      (n0 = sum(n15, n6)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2485])).
% 52.53/52.77  tff(2487,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n2, n19)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2306, 767])).
% 52.53/52.77  tff(2488,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.53/52.77      inference(transitivity,[status(thm)],[2487, 1463])).
% 52.53/52.77  tff(2489,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n17, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[770, 2304])).
% 52.53/52.77  tff(2490,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.53/52.77      inference(transitivity,[status(thm)],[2489, 1460])).
% 52.53/52.77  tff(2491,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2490, 2488])).
% 52.53/52.77  tff(2492,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2491, 75, 2486, 2484])).
% 52.53/52.77  tff(2493,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2492])).
% 52.53/52.77  tff(2494,plain,((~(X!1 = n18)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2495,plain,
% 52.53/52.77      (~(X!1 = n18)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2494, 2302])).
% 52.53/52.77  tff(2496,plain,
% 52.53/52.77      (sum(n19, n0) = n19),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2497,plain,
% 52.53/52.77      (succ(n20) = n0),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2498,assumption,(X!1 = n20), introduced(assumption)).
% 52.53/52.77  tff(2499,plain,
% 52.53/52.77      (succ(X!1) = succ(n20)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2498])).
% 52.53/52.77  tff(2500,plain,
% 52.53/52.77      (succ(X!1) = n0),
% 52.53/52.77      inference(transitivity,[status(thm)],[2499, 2497])).
% 52.53/52.77  tff(2501,plain,
% 52.53/52.77      (pred(n20) = n19),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2502,plain,
% 52.53/52.77      (pred(X!1) = pred(n20)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2498])).
% 52.53/52.77  tff(2503,plain,
% 52.53/52.77      (pred(X!1) = n19),
% 52.53/52.77      inference(transitivity,[status(thm)],[2502, 2501])).
% 52.53/52.77  tff(2504,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = sum(n19, n0)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2503, 2500])).
% 52.53/52.77  tff(2505,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = n19),
% 52.53/52.77      inference(transitivity,[status(thm)],[2504, 2496])).
% 52.53/52.77  tff(2506,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2505, 2308])).
% 52.53/52.77  tff(2507,plain,
% 52.53/52.77      (sum(n19, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2506])).
% 52.53/52.77  tff(2508,plain,
% 52.53/52.77      (sum(n19, n6) = n4),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2509,plain,
% 52.53/52.77      (n4 = sum(n19, n6)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2508])).
% 52.53/52.77  tff(2510,plain,
% 52.53/52.77      (sum(n2, n0) = n2),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2511,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n2, n0)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2306, 2500])).
% 52.53/52.77  tff(2512,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.53/52.77      inference(transitivity,[status(thm)],[2511, 2510])).
% 52.53/52.77  tff(2513,plain,
% 52.53/52.77      (sum(n19, n4) = n2),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2514,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n19, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2503, 2304])).
% 52.53/52.77  tff(2515,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.53/52.77      inference(transitivity,[status(thm)],[2514, 2513])).
% 52.53/52.77  tff(2516,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2515, 2512])).
% 52.53/52.77  tff(2517,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2516, 583, 2509, 2507])).
% 52.53/52.77  tff(2518,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2517])).
% 52.53/52.77  tff(2519,plain,((~(X!1 = n20)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2520,plain,
% 52.53/52.77      (~(X!1 = n20)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2519, 2302])).
% 52.53/52.77  tff(2521,assumption,(X!1 = n19), introduced(assumption)).
% 52.53/52.77  tff(2522,plain,
% 52.53/52.77      (succ(X!1) = succ(n19)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2521])).
% 52.53/52.77  tff(2523,plain,
% 52.53/52.77      (succ(X!1) = n20),
% 52.53/52.77      inference(transitivity,[status(thm)],[2522, 1492])).
% 52.53/52.77  tff(2524,plain,
% 52.53/52.77      (pred(X!1) = pred(n19)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2521])).
% 52.53/52.77  tff(2525,plain,
% 52.53/52.77      (pred(X!1) = n18),
% 52.53/52.77      inference(transitivity,[status(thm)],[2524, 1496])).
% 52.53/52.77  tff(2526,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = sum(n18, n20)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2525, 2523])).
% 52.53/52.77  tff(2527,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = n17),
% 52.53/52.77      inference(transitivity,[status(thm)],[2526, 1491])).
% 52.53/52.77  tff(2528,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2527, 2308])).
% 52.53/52.77  tff(2529,plain,
% 52.53/52.77      (sum(n17, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2528])).
% 52.53/52.77  tff(2530,plain,
% 52.53/52.77      (sum(n17, n6) = n2),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2531,plain,
% 52.53/52.77      (n2 = sum(n17, n6)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2530])).
% 52.53/52.77  tff(2532,plain,
% 52.53/52.77      (sum(n2, n20) = n1),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2533,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n2, n20)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2306, 2523])).
% 52.53/52.77  tff(2534,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.53/52.77      inference(transitivity,[status(thm)],[2533, 2532])).
% 52.53/52.77  tff(2535,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n18, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2525, 2304])).
% 52.53/52.77  tff(2536,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.53/52.77      inference(transitivity,[status(thm)],[2535, 807])).
% 52.53/52.77  tff(2537,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2536, 2534])).
% 52.53/52.77  tff(2538,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2537, 599, 2531, 2529])).
% 52.53/52.77  tff(2539,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2538])).
% 52.53/52.77  tff(2540,plain,((~(X!1 = n19)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2541,plain,
% 52.53/52.77      (~(X!1 = n19)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2540, 2302])).
% 52.53/52.77  tff(2542,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n2, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2306, 1251])).
% 52.53/52.77  tff(2543,plain,
% 52.53/52.77      (pred(n3) = pred(Y!0)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2305])).
% 52.53/52.77  tff(2544,plain,
% 52.53/52.77      (pred(X!1) = pred(Y!0)),
% 52.53/52.77      inference(transitivity,[status(thm)],[1253, 2543])).
% 52.53/52.77  tff(2545,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2544])).
% 52.53/52.77  tff(2546,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = n6),
% 52.53/52.77      inference(transitivity,[status(thm)],[2545, 2542, 1248])).
% 52.53/52.77  tff(2547,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2546, 2308])).
% 52.53/52.77  tff(2548,plain,
% 52.53/52.77      (sum(n6, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2547])).
% 52.53/52.77  tff(2549,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.53/52.77      inference(transitivity,[status(thm)],[2542, 1248])).
% 52.53/52.77  tff(2550,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n2, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[1254, 2304])).
% 52.53/52.77  tff(2551,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.53/52.77      inference(transitivity,[status(thm)],[2550, 1248])).
% 52.53/52.77  tff(2552,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2551, 2549])).
% 52.53/52.77  tff(2553,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2552, 2548])).
% 52.53/52.77  tff(2554,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2553])).
% 52.53/52.77  tff(2555,plain,((~(X!1 = n3)) | (~(Y!0 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2556,plain,
% 52.53/52.77      (~(X!1 = n3)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2555, 2302])).
% 52.53/52.77  tff(2557,assumption,(X!1 = n1), introduced(assumption)).
% 52.53/52.77  tff(2558,plain,
% 52.53/52.77      (succ(X!1) = succ(n1)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2557])).
% 52.53/52.77  tff(2559,plain,
% 52.53/52.77      (succ(X!1) = n2),
% 52.53/52.77      inference(transitivity,[status(thm)],[2558, 627])).
% 52.53/52.77  tff(2560,plain,
% 52.53/52.77      (pred(X!1) = pred(n1)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2557])).
% 52.53/52.77  tff(2561,plain,
% 52.53/52.77      (pred(X!1) = n0),
% 52.53/52.77      inference(transitivity,[status(thm)],[2560, 631])).
% 52.53/52.77  tff(2562,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = sum(n0, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 2559])).
% 52.53/52.77  tff(2563,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = n2),
% 52.53/52.77      inference(transitivity,[status(thm)],[2562, 626])).
% 52.53/52.77  tff(2564,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n20)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 1435])).
% 52.53/52.77  tff(2565,plain,
% 52.53/52.77      (sum(n2, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2564])).
% 52.53/52.77  tff(2566,plain,
% 52.53/52.77      (n1 = sum(n2, n20)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2532])).
% 52.53/52.77  tff(2567,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n9, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[1433, 2559])).
% 52.53/52.77  tff(2568,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.53/52.77      inference(transitivity,[status(thm)],[2567, 665])).
% 52.53/52.77  tff(2569,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n11)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 1431])).
% 52.53/52.77  tff(2570,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.53/52.77      inference(transitivity,[status(thm)],[2569, 662])).
% 52.53/52.77  tff(2571,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2570, 2568])).
% 52.53/52.77  tff(2572,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2571, 438, 2566, 2565])).
% 52.53/52.77  tff(2573,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2572])).
% 52.53/52.77  tff(2574,plain,((~(Y!0 = n10)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2575,plain,
% 52.53/52.77      (~(Y!0 = n10)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2574, 2557])).
% 52.53/52.77  tff(2576,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n16)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 1898])).
% 52.53/52.77  tff(2577,plain,
% 52.53/52.77      (sum(n2, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2576])).
% 52.53/52.77  tff(2578,plain,
% 52.53/52.77      (n18 = sum(n2, n16)),
% 52.53/52.77      inference(symmetry,[status(thm)],[1333])).
% 52.53/52.77  tff(2579,plain,
% 52.53/52.77      (sum(n7, n2) = n9),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2580,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n7, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[1896, 2559])).
% 52.53/52.77  tff(2581,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.53/52.77      inference(transitivity,[status(thm)],[2580, 2579])).
% 52.53/52.77  tff(2582,plain,
% 52.53/52.77      (sum(n0, n9) = n9),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2583,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n9)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 1894])).
% 52.53/52.77  tff(2584,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.53/52.77      inference(transitivity,[status(thm)],[2583, 2582])).
% 52.53/52.77  tff(2585,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2584, 2581])).
% 52.53/52.77  tff(2586,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2585, 1315, 2578, 2577])).
% 52.53/52.77  tff(2587,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2586])).
% 52.53/52.77  tff(2588,plain,((~(Y!0 = n8)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2589,plain,
% 52.53/52.77      (~(Y!0 = n8)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2588, 2557])).
% 52.53/52.77  tff(2590,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n8)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 1477])).
% 52.53/52.77  tff(2591,plain,
% 52.53/52.77      (sum(n2, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2590])).
% 52.53/52.77  tff(2592,plain,
% 52.53/52.77      (n10 = sum(n2, n8)),
% 52.53/52.77      inference(symmetry,[status(thm)],[1362])).
% 52.53/52.77  tff(2593,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n3, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[1475, 2559])).
% 52.53/52.77  tff(2594,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.53/52.77      inference(transitivity,[status(thm)],[2593, 690])).
% 52.53/52.77  tff(2595,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n5)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 1473])).
% 52.53/52.77  tff(2596,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.53/52.77      inference(transitivity,[status(thm)],[2595, 706])).
% 52.53/52.77  tff(2597,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2596, 2594])).
% 52.53/52.77  tff(2598,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2597, 313, 2592, 2591])).
% 52.53/52.77  tff(2599,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2598])).
% 52.53/52.77  tff(2600,plain,((~(Y!0 = n4)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2601,plain,
% 52.53/52.77      (~(Y!0 = n4)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2600, 2557])).
% 52.53/52.77  tff(2602,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n4)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 797])).
% 52.53/52.77  tff(2603,plain,
% 52.53/52.77      (sum(n2, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2602])).
% 52.53/52.77  tff(2604,plain,
% 52.53/52.77      (n6 = sum(n2, n4)),
% 52.53/52.77      inference(symmetry,[status(thm)],[1248])).
% 52.53/52.77  tff(2605,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n1, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[795, 2559])).
% 52.53/52.77  tff(2606,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.53/52.77      inference(transitivity,[status(thm)],[2605, 675])).
% 52.53/52.77  tff(2607,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n3)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 792])).
% 52.53/52.77  tff(2608,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.53/52.77      inference(transitivity,[status(thm)],[2607, 1694])).
% 52.53/52.77  tff(2609,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2608, 2606])).
% 52.53/52.77  tff(2610,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2609, 224, 2604, 2603])).
% 52.53/52.77  tff(2611,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2610])).
% 52.53/52.77  tff(2612,plain,((~(Y!0 = n2)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2613,plain,
% 52.53/52.77      (~(Y!0 = n2)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2612, 2557])).
% 52.53/52.77  tff(2614,plain,
% 52.53/52.77      (succ(n1) = succ(X!1)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2558])).
% 52.53/52.77  tff(2615,plain,
% 52.53/52.77      (succ(Y!0) = succ(X!1)),
% 52.53/52.77      inference(transitivity,[status(thm)],[629, 2614])).
% 52.53/52.77  tff(2616,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2615])).
% 52.53/52.77  tff(2617,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 630])).
% 52.53/52.77  tff(2618,plain,
% 52.53/52.77      (sum(n0, n2) = sum(pred(X!1), succ(Y!0))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2617])).
% 52.53/52.77  tff(2619,plain,
% 52.53/52.77      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2562, 2618])).
% 52.53/52.77  tff(2620,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2619, 2616])).
% 52.53/52.77  tff(2621,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2620])).
% 52.53/52.77  tff(2622,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2621])).
% 52.53/52.77  tff(2623,plain,((~(Y!0 = n1)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2624,plain,
% 52.53/52.77      (~(Y!0 = n1)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2623, 2557])).
% 52.53/52.77  tff(2625,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n0)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 425])).
% 52.53/52.77  tff(2626,plain,
% 52.53/52.77      (sum(n2, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2625])).
% 52.53/52.77  tff(2627,plain,
% 52.53/52.77      (n2 = sum(n2, n0)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2510])).
% 52.53/52.77  tff(2628,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n20, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[423, 2559])).
% 52.53/52.77  tff(2629,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.53/52.77      inference(transitivity,[status(thm)],[2628, 660])).
% 52.53/52.77  tff(2630,plain,
% 52.53/52.77      (sum(n0, n1) = n1),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2631,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n1)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 420])).
% 52.53/52.77  tff(2632,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.53/52.77      inference(transitivity,[status(thm)],[2631, 2630])).
% 52.53/52.77  tff(2633,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2632, 2629])).
% 52.53/52.77  tff(2634,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2633, 599, 2627, 2626])).
% 52.53/52.77  tff(2635,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2634])).
% 52.53/52.77  tff(2636,plain,((~(Y!0 = n0)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2637,plain,
% 52.53/52.77      (~(Y!0 = n0)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2636, 2557])).
% 52.53/52.77  tff(2638,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n5)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 332])).
% 52.53/52.77  tff(2639,plain,
% 52.53/52.77      (sum(n2, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2638])).
% 52.53/52.77  tff(2640,plain,
% 52.53/52.77      (n7 = sum(n2, n5)),
% 52.53/52.77      inference(symmetry,[status(thm)],[1483])).
% 52.53/52.77  tff(2641,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n12, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[330, 2559])).
% 52.53/52.77  tff(2642,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.53/52.77      inference(transitivity,[status(thm)],[2641, 1036])).
% 52.53/52.77  tff(2643,plain,
% 52.53/52.77      (sum(n0, n14) = n14),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2644,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n14)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 327])).
% 52.53/52.77  tff(2645,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.53/52.77      inference(transitivity,[status(thm)],[2644, 2643])).
% 52.53/52.77  tff(2646,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2645, 2642])).
% 52.53/52.77  tff(2647,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2646, 192, 2640, 2639])).
% 52.53/52.77  tff(2648,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2647])).
% 52.53/52.77  tff(2649,plain,((~(Y!0 = n13)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2650,plain,
% 52.53/52.77      (~(Y!0 = n13)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2649, 2557])).
% 52.53/52.77  tff(2651,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n18)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 160])).
% 52.53/52.77  tff(2652,plain,
% 52.53/52.77      (sum(n2, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2651])).
% 52.53/52.77  tff(2653,plain,
% 52.53/52.77      (n20 = sum(n2, n18)),
% 52.53/52.77      inference(symmetry,[status(thm)],[1399])).
% 52.53/52.77  tff(2654,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n8, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[158, 2559])).
% 52.53/52.77  tff(2655,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.53/52.77      inference(transitivity,[status(thm)],[2654, 704])).
% 52.53/52.77  tff(2656,plain,
% 52.53/52.77      (sum(n0, n10) = n10),
% 52.53/52.77      inference(and_elim,[status(thm)],[9])).
% 52.53/52.77  tff(2657,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n10)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 155])).
% 52.53/52.77  tff(2658,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.53/52.77      inference(transitivity,[status(thm)],[2657, 2656])).
% 52.53/52.77  tff(2659,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2658, 2655])).
% 52.53/52.77  tff(2660,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2659, 1358, 2653, 2652])).
% 52.53/52.77  tff(2661,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2660])).
% 52.53/52.77  tff(2662,plain,((~(Y!0 = n9)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2663,plain,
% 52.53/52.77      (~(Y!0 = n9)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2662, 2557])).
% 52.53/52.77  tff(2664,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n10)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 96])).
% 52.53/52.77  tff(2665,plain,
% 52.53/52.77      (sum(n2, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2664])).
% 52.53/52.77  tff(2666,plain,
% 52.53/52.77      (n12 = sum(n2, n10)),
% 52.53/52.77      inference(symmetry,[status(thm)],[1291])).
% 52.53/52.77  tff(2667,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n4, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[94, 2559])).
% 52.53/52.77  tff(2668,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.53/52.77      inference(transitivity,[status(thm)],[2667, 722])).
% 52.53/52.77  tff(2669,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 91])).
% 52.53/52.77  tff(2670,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.53/52.77      inference(transitivity,[status(thm)],[2669, 719])).
% 52.53/52.77  tff(2671,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2670, 2668])).
% 52.53/52.77  tff(2672,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2671, 127, 2666, 2665])).
% 52.53/52.77  tff(2673,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2672])).
% 52.53/52.77  tff(2674,plain,((~(Y!0 = n5)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2675,plain,
% 52.53/52.77      (~(Y!0 = n5)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2674, 2557])).
% 52.53/52.77  tff(2676,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n12)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 34])).
% 52.53/52.77  tff(2677,plain,
% 52.53/52.77      (sum(n2, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2676])).
% 52.53/52.77  tff(2678,plain,
% 52.53/52.77      (n14 = sum(n2, n12)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2397])).
% 52.53/52.77  tff(2679,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n5, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[32, 2559])).
% 52.53/52.77  tff(2680,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.53/52.77      inference(transitivity,[status(thm)],[2679, 1041])).
% 52.53/52.77  tff(2681,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n7)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 29])).
% 52.53/52.77  tff(2682,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.53/52.77      inference(transitivity,[status(thm)],[2681, 1038])).
% 52.53/52.77  tff(2683,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2682, 2680])).
% 52.53/52.77  tff(2684,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(transitivity,[status(thm)],[2683, 405, 2678, 2677])).
% 52.53/52.77  tff(2685,plain,
% 52.53/52.77      ($false),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[60, 2684])).
% 52.53/52.77  tff(2686,plain,((~(Y!0 = n6)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.53/52.77  tff(2687,plain,
% 52.53/52.77      (~(Y!0 = n6)),
% 52.53/52.77      inference(unit_resolution,[status(thm)],[2686, 2557])).
% 52.53/52.77  tff(2688,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n9)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2563, 21])).
% 52.53/52.77  tff(2689,plain,
% 52.53/52.77      (sum(n2, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.53/52.77      inference(symmetry,[status(thm)],[2688])).
% 52.53/52.77  tff(2690,plain,
% 52.53/52.77      (n11 = sum(n2, n9)),
% 52.53/52.77      inference(symmetry,[status(thm)],[2060])).
% 52.53/52.77  tff(2691,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n14, n2)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[19, 2559])).
% 52.53/52.77  tff(2692,plain,
% 52.53/52.77      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.53/52.77      inference(transitivity,[status(thm)],[2691, 732])).
% 52.53/52.77  tff(2693,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n16)),
% 52.53/52.77      inference(monotonicity,[status(thm)],[2561, 16])).
% 52.53/52.77  tff(2694,plain,
% 52.53/52.77      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.53/52.77      inference(transitivity,[status(thm)],[2693, 748])).
% 52.53/52.77  tff(2695,plain,
% 52.53/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.54/52.77      inference(monotonicity,[status(thm)],[2694, 2692])).
% 52.54/52.77  tff(2696,plain,
% 52.54/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.77      inference(transitivity,[status(thm)],[2695, 208, 2690, 2689])).
% 52.54/52.77  tff(2697,plain,
% 52.54/52.77      ($false),
% 52.54/52.77      inference(unit_resolution,[status(thm)],[60, 2696])).
% 52.54/52.77  tff(2698,plain,((~(Y!0 = n15)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.77  tff(2699,plain,
% 52.54/52.77      (~(Y!0 = n15)),
% 52.54/52.77      inference(unit_resolution,[status(thm)],[2698, 2557])).
% 52.54/52.77  tff(2700,plain,
% 52.54/52.77      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n7)),
% 52.54/52.77      inference(monotonicity,[status(thm)],[2563, 283])).
% 52.54/52.77  tff(2701,plain,
% 52.54/52.77      (sum(n2, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.77      inference(symmetry,[status(thm)],[2700])).
% 52.54/52.77  tff(2702,plain,
% 52.54/52.77      (n9 = sum(n2, n7)),
% 52.54/52.77      inference(symmetry,[status(thm)],[1319])).
% 52.54/52.77  tff(2703,plain,
% 52.54/52.77      (sum(pred(Y!0), succ(X!1)) = sum(n13, n2)),
% 52.54/52.77      inference(monotonicity,[status(thm)],[281, 2559])).
% 52.54/52.77  tff(2704,plain,
% 52.54/52.77      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.54/52.77      inference(transitivity,[status(thm)],[2703, 2089])).
% 52.54/52.77  tff(2705,plain,
% 52.54/52.77      (sum(n0, n15) = n15),
% 52.54/52.77      inference(and_elim,[status(thm)],[9])).
% 52.54/52.77  tff(2706,plain,
% 52.54/52.77      (sum(pred(X!1), succ(Y!0)) = sum(n0, n15)),
% 52.54/52.77      inference(monotonicity,[status(thm)],[2561, 278])).
% 52.54/52.77  tff(2707,plain,
% 52.54/52.77      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.54/52.77      inference(transitivity,[status(thm)],[2706, 2705])).
% 52.54/52.77  tff(2708,plain,
% 52.54/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.54/52.77      inference(monotonicity,[status(thm)],[2707, 2704])).
% 52.54/52.77  tff(2709,plain,
% 52.54/52.77      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.77      inference(transitivity,[status(thm)],[2708, 513, 2702, 2701])).
% 52.54/52.77  tff(2710,plain,
% 52.54/52.77      ($false),
% 52.54/52.77      inference(unit_resolution,[status(thm)],[60, 2709])).
% 52.54/52.77  tff(2711,plain,((~(Y!0 = n14)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2712,plain,
% 52.54/52.78      (~(Y!0 = n14)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2711, 2557])).
% 52.54/52.78  tff(2713,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n14)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2563, 1055])).
% 52.54/52.78  tff(2714,plain,
% 52.54/52.78      (sum(n2, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2713])).
% 52.54/52.78  tff(2715,plain,
% 52.54/52.78      (n16 = sum(n2, n14)),
% 52.54/52.78      inference(symmetry,[status(thm)],[1277])).
% 52.54/52.78  tff(2716,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n6, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1053, 2559])).
% 52.54/52.78  tff(2717,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.54/52.78      inference(transitivity,[status(thm)],[2716, 737])).
% 52.54/52.78  tff(2718,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n0, n8)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2561, 1051])).
% 52.54/52.78  tff(2719,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.54/52.78      inference(transitivity,[status(thm)],[2718, 734])).
% 52.54/52.78  tff(2720,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2719, 2717])).
% 52.54/52.78  tff(2721,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2720, 209, 2715, 2714])).
% 52.54/52.78  tff(2722,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2721])).
% 52.54/52.78  tff(2723,plain,((~(Y!0 = n7)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2724,plain,
% 52.54/52.78      (~(Y!0 = n7)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2723, 2557])).
% 52.54/52.78  tff(2725,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n11)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2563, 308])).
% 52.54/52.78  tff(2726,plain,
% 52.54/52.78      (sum(n2, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2725])).
% 52.54/52.78  tff(2727,plain,
% 52.54/52.78      (n13 = sum(n2, n11)),
% 52.54/52.78      inference(symmetry,[status(thm)],[1442])).
% 52.54/52.78  tff(2728,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n15, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[306, 2559])).
% 52.54/52.78  tff(2729,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.54/52.78      inference(transitivity,[status(thm)],[2728, 650])).
% 52.54/52.78  tff(2730,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n0, n17)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2561, 303])).
% 52.54/52.78  tff(2731,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.54/52.78      inference(transitivity,[status(thm)],[2730, 647])).
% 52.54/52.78  tff(2732,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2731, 2729])).
% 52.54/52.78  tff(2733,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2732, 358, 2727, 2726])).
% 52.54/52.78  tff(2734,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2733])).
% 52.54/52.78  tff(2735,plain,((~(Y!0 = n16)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2736,plain,
% 52.54/52.78      (~(Y!0 = n16)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2735, 2557])).
% 52.54/52.78  tff(2737,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n13)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2563, 1392])).
% 52.54/52.78  tff(2738,plain,
% 52.54/52.78      (sum(n2, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2737])).
% 52.54/52.78  tff(2739,plain,
% 52.54/52.78      (n15 = sum(n2, n13)),
% 52.54/52.78      inference(symmetry,[status(thm)],[1421])).
% 52.54/52.78  tff(2740,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n16, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1390, 2559])).
% 52.54/52.78  tff(2741,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.54/52.78      inference(transitivity,[status(thm)],[2740, 2094])).
% 52.54/52.78  tff(2742,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n0, n18)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2561, 1387])).
% 52.54/52.78  tff(2743,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.54/52.78      inference(transitivity,[status(thm)],[2742, 2091])).
% 52.54/52.78  tff(2744,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2743, 2741])).
% 52.54/52.78  tff(2745,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2744, 374, 2739, 2738])).
% 52.54/52.78  tff(2746,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2745])).
% 52.54/52.78  tff(2747,plain,((~(Y!0 = n17)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2748,plain,
% 52.54/52.78      (~(Y!0 = n17)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2747, 2557])).
% 52.54/52.78  tff(2749,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n15)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2563, 1456])).
% 52.54/52.78  tff(2750,plain,
% 52.54/52.78      (sum(n2, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2749])).
% 52.54/52.78  tff(2751,plain,
% 52.54/52.78      (n17 = sum(n2, n15)),
% 52.54/52.78      inference(symmetry,[status(thm)],[1347])).
% 52.54/52.78  tff(2752,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n17, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1454, 2559])).
% 52.54/52.78  tff(2753,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.54/52.78      inference(transitivity,[status(thm)],[2752, 780])).
% 52.54/52.78  tff(2754,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n0, n19)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2561, 1452])).
% 52.54/52.78  tff(2755,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.54/52.78      inference(transitivity,[status(thm)],[2754, 777])).
% 52.54/52.78  tff(2756,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2755, 2753])).
% 52.54/52.78  tff(2757,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2756, 776, 2751, 2750])).
% 52.54/52.78  tff(2758,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2757])).
% 52.54/52.78  tff(2759,plain,((~(Y!0 = n18)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2760,plain,
% 52.54/52.78      (~(Y!0 = n18)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2759, 2557])).
% 52.54/52.78  tff(2761,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n17)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2563, 1500])).
% 52.54/52.78  tff(2762,plain,
% 52.54/52.78      (sum(n2, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2761])).
% 52.54/52.78  tff(2763,plain,
% 52.54/52.78      (n19 = sum(n2, n17)),
% 52.54/52.78      inference(symmetry,[status(thm)],[1376])).
% 52.54/52.78  tff(2764,plain,
% 52.54/52.78      (sum(n18, n2) = n20),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2765,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n18, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1498, 2559])).
% 52.54/52.78  tff(2766,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.54/52.78      inference(transitivity,[status(thm)],[2765, 2764])).
% 52.54/52.78  tff(2767,plain,
% 52.54/52.78      (sum(n0, n20) = n20),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2768,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n0, n20)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2561, 1495])).
% 52.54/52.78  tff(2769,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.54/52.78      inference(transitivity,[status(thm)],[2768, 2767])).
% 52.54/52.78  tff(2770,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2769, 2766])).
% 52.54/52.78  tff(2771,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2770, 139, 2763, 2762])).
% 52.54/52.78  tff(2772,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2771])).
% 52.54/52.78  tff(2773,plain,((~(Y!0 = n19)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2774,plain,
% 52.54/52.78      (~(Y!0 = n19)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2773, 2557])).
% 52.54/52.78  tff(2775,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n3)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2563, 1413])).
% 52.54/52.78  tff(2776,plain,
% 52.54/52.78      (sum(n2, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2775])).
% 52.54/52.78  tff(2777,plain,
% 52.54/52.78      (sum(n2, n3) = n5),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2778,plain,
% 52.54/52.78      (n5 = sum(n2, n3)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2777])).
% 52.54/52.78  tff(2779,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n11, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1411, 2559])).
% 52.54/52.78  tff(2780,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.54/52.78      inference(transitivity,[status(thm)],[2779, 645])).
% 52.54/52.78  tff(2781,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n0, n13)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2561, 1409])).
% 52.54/52.78  tff(2782,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.54/52.78      inference(transitivity,[status(thm)],[2781, 692])).
% 52.54/52.78  tff(2783,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2782, 2780])).
% 52.54/52.78  tff(2784,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2783, 51, 2778, 2776])).
% 52.54/52.78  tff(2785,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2784])).
% 52.54/52.78  tff(2786,plain,((~(Y!0 = n12)) | (~(X!1 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2787,plain,
% 52.54/52.78      (~(Y!0 = n12)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2786, 2557])).
% 52.54/52.78  tff(2788,assumption,(Y!0 = n11), introduced(assumption)).
% 52.54/52.78  tff(2789,plain,
% 52.54/52.78      (succ(Y!0) = succ(n11)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2788])).
% 52.54/52.78  tff(2790,plain,
% 52.54/52.78      (succ(Y!0) = n12),
% 52.54/52.78      inference(transitivity,[status(thm)],[2789, 162])).
% 52.54/52.78  tff(2791,plain,
% 52.54/52.78      (pred(Y!0) = pred(n11)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2788])).
% 52.54/52.78  tff(2792,plain,
% 52.54/52.78      (pred(Y!0) = n10),
% 52.54/52.78      inference(transitivity,[status(thm)],[2791, 429])).
% 52.54/52.78  tff(2793,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(Y!0)) = sum(n10, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 2790])).
% 52.54/52.78  tff(2794,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(Y!0)) = n1),
% 52.54/52.78      inference(transitivity,[status(thm)],[2793, 161])).
% 52.54/52.78  tff(2795,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1256, 2794])).
% 52.54/52.78  tff(2796,plain,
% 52.54/52.78      (sum(n6, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2795])).
% 52.54/52.78  tff(2797,plain,
% 52.54/52.78      (n7 = sum(n6, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[501])).
% 52.54/52.78  tff(2798,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n4)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 1251])).
% 52.54/52.78  tff(2799,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.54/52.78      inference(transitivity,[status(thm)],[2798, 896])).
% 52.54/52.78  tff(2800,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n2, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1254, 2790])).
% 52.54/52.78  tff(2801,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.54/52.78      inference(transitivity,[status(thm)],[2800, 2397])).
% 52.54/52.78  tff(2802,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2801, 2799])).
% 52.54/52.78  tff(2803,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2802, 192, 2797, 2796])).
% 52.54/52.78  tff(2804,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2803])).
% 52.54/52.78  tff(2805,plain,((~(X!1 = n3)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2806,plain,
% 52.54/52.78      (~(X!1 = n3)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2805, 2788])).
% 52.54/52.78  tff(2807,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[170, 2794])).
% 52.54/52.78  tff(2808,plain,
% 52.54/52.78      (sum(n8, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2807])).
% 52.54/52.78  tff(2809,plain,
% 52.54/52.78      (sum(n8, n1) = n9),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2810,plain,
% 52.54/52.78      (n9 = sum(n8, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2809])).
% 52.54/52.78  tff(2811,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n5)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 165])).
% 52.54/52.78  tff(2812,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.54/52.78      inference(transitivity,[status(thm)],[2811, 372])).
% 52.54/52.78  tff(2813,plain,
% 52.54/52.78      (sum(n3, n12) = n15),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2814,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n3, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[168, 2790])).
% 52.54/52.78  tff(2815,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.54/52.78      inference(transitivity,[status(thm)],[2814, 2813])).
% 52.54/52.78  tff(2816,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2815, 2812])).
% 52.54/52.78  tff(2817,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2816, 513, 2810, 2808])).
% 52.54/52.78  tff(2818,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2817])).
% 52.54/52.78  tff(2819,plain,((~(X!1 = n4)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2820,plain,
% 52.54/52.78      (~(X!1 = n4)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2819, 2788])).
% 52.54/52.78  tff(2821,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[187, 2794])).
% 52.54/52.78  tff(2822,plain,
% 52.54/52.78      (sum(n10, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2821])).
% 52.54/52.78  tff(2823,plain,
% 52.54/52.78      (n11 = sum(n10, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[441])).
% 52.54/52.78  tff(2824,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n6)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 101])).
% 52.54/52.78  tff(2825,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.54/52.78      inference(transitivity,[status(thm)],[2824, 2323])).
% 52.54/52.78  tff(2826,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n4, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[111, 2790])).
% 52.54/52.78  tff(2827,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.54/52.78      inference(transitivity,[status(thm)],[2826, 1759])).
% 52.54/52.78  tff(2828,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2827, 2825])).
% 52.54/52.78  tff(2829,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2828, 208, 2823, 2822])).
% 52.54/52.78  tff(2830,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2829])).
% 52.54/52.78  tff(2831,plain,((~(X!1 = n5)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2832,plain,
% 52.54/52.78      (~(X!1 = n5)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2831, 2788])).
% 52.54/52.78  tff(2833,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[937, 2794])).
% 52.54/52.78  tff(2834,plain,
% 52.54/52.78      (sum(n12, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2833])).
% 52.54/52.78  tff(2835,plain,
% 52.54/52.78      (sum(n12, n1) = n13),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2836,plain,
% 52.54/52.78      (n13 = sum(n12, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2835])).
% 52.54/52.78  tff(2837,plain,
% 52.54/52.78      (sum(n10, n7) = n17),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2838,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n7)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 933])).
% 52.54/52.78  tff(2839,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.54/52.78      inference(transitivity,[status(thm)],[2838, 2837])).
% 52.54/52.78  tff(2840,plain,
% 52.54/52.78      (sum(n5, n12) = n17),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2841,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n5, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[935, 2790])).
% 52.54/52.78  tff(2842,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.54/52.78      inference(transitivity,[status(thm)],[2841, 2840])).
% 52.54/52.78  tff(2843,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2842, 2839])).
% 52.54/52.78  tff(2844,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2843, 358, 2836, 2834])).
% 52.54/52.78  tff(2845,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2844])).
% 52.54/52.78  tff(2846,plain,((~(X!1 = n6)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2847,plain,
% 52.54/52.78      (~(X!1 = n6)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2846, 2788])).
% 52.54/52.78  tff(2848,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[46, 2794])).
% 52.54/52.78  tff(2849,plain,
% 52.54/52.78      (sum(n14, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2848])).
% 52.54/52.78  tff(2850,plain,
% 52.54/52.78      (n15 = sum(n14, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[517])).
% 52.54/52.78  tff(2851,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n8)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 41])).
% 52.54/52.78  tff(2852,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.54/52.78      inference(transitivity,[status(thm)],[2851, 1106])).
% 52.54/52.78  tff(2853,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n6, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[44, 2790])).
% 52.54/52.78  tff(2854,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.54/52.78      inference(transitivity,[status(thm)],[2853, 1103])).
% 52.54/52.78  tff(2855,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2854, 2852])).
% 52.54/52.78  tff(2856,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2855, 374, 2850, 2849])).
% 52.54/52.78  tff(2857,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2856])).
% 52.54/52.78  tff(2858,plain,((~(X!1 = n7)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2859,plain,
% 52.54/52.78      (~(X!1 = n7)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2858, 2788])).
% 52.54/52.78  tff(2860,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[534, 2794])).
% 52.54/52.78  tff(2861,plain,
% 52.54/52.78      (sum(n16, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2860])).
% 52.54/52.78  tff(2862,plain,
% 52.54/52.78      (n17 = sum(n16, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2109])).
% 52.54/52.78  tff(2863,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n9)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 529])).
% 52.54/52.78  tff(2864,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.54/52.78      inference(transitivity,[status(thm)],[2863, 1996])).
% 52.54/52.78  tff(2865,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n7, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[532, 2790])).
% 52.54/52.78  tff(2866,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.54/52.78      inference(transitivity,[status(thm)],[2865, 1993])).
% 52.54/52.78  tff(2867,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2866, 2864])).
% 52.54/52.78  tff(2868,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2867, 776, 2862, 2861])).
% 52.54/52.78  tff(2869,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2868])).
% 52.54/52.78  tff(2870,plain,((~(X!1 = n8)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2871,plain,
% 52.54/52.78      (~(X!1 = n8)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2870, 2788])).
% 52.54/52.78  tff(2872,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[804, 2794])).
% 52.54/52.78  tff(2873,plain,
% 52.54/52.78      (sum(n18, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2872])).
% 52.54/52.78  tff(2874,plain,
% 52.54/52.78      (sum(n18, n1) = n19),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2875,plain,
% 52.54/52.78      (n19 = sum(n18, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2874])).
% 52.54/52.78  tff(2876,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n10)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 800])).
% 52.54/52.78  tff(2877,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.54/52.78      inference(transitivity,[status(thm)],[2876, 1358])).
% 52.54/52.78  tff(2878,plain,
% 52.54/52.78      (sum(n8, n12) = n20),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2879,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n8, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[802, 2790])).
% 52.54/52.78  tff(2880,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.54/52.78      inference(transitivity,[status(thm)],[2879, 2878])).
% 52.54/52.78  tff(2881,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2880, 2877])).
% 52.54/52.78  tff(2882,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2881, 139, 2875, 2873])).
% 52.54/52.78  tff(2883,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2882])).
% 52.54/52.78  tff(2884,plain,((~(X!1 = n9)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2885,plain,
% 52.54/52.78      (~(X!1 = n9)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2884, 2788])).
% 52.54/52.78  tff(2886,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[244, 2794])).
% 52.54/52.78  tff(2887,plain,
% 52.54/52.78      (sum(n20, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2886])).
% 52.54/52.78  tff(2888,plain,
% 52.54/52.78      (n0 = sum(n20, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[416])).
% 52.54/52.78  tff(2889,plain,
% 52.54/52.78      (sum(n10, n11) = n0),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2890,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n11)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 239])).
% 52.54/52.78  tff(2891,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.54/52.78      inference(transitivity,[status(thm)],[2890, 2889])).
% 52.54/52.78  tff(2892,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n9, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[242, 2790])).
% 52.54/52.78  tff(2893,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.54/52.78      inference(transitivity,[status(thm)],[2892, 73])).
% 52.54/52.78  tff(2894,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2893, 2891])).
% 52.54/52.78  tff(2895,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2894, 75, 2888, 2887])).
% 52.54/52.78  tff(2896,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2895])).
% 52.54/52.78  tff(2897,plain,((~(X!1 = n10)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2898,plain,
% 52.54/52.78      (~(X!1 = n10)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2897, 2788])).
% 52.54/52.78  tff(2899,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 428])).
% 52.54/52.78  tff(2900,plain,
% 52.54/52.78      (pred(n11) = pred(Y!0)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2791])).
% 52.54/52.78  tff(2901,plain,
% 52.54/52.78      (pred(X!1) = pred(Y!0)),
% 52.54/52.78      inference(transitivity,[status(thm)],[430, 2900])).
% 52.54/52.78  tff(2902,plain,
% 52.54/52.78      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2901])).
% 52.54/52.78  tff(2903,plain,
% 52.54/52.78      (sum(pred(X!1), succ(X!1)) = n1),
% 52.54/52.78      inference(transitivity,[status(thm)],[2902, 2899, 161])).
% 52.54/52.78  tff(2904,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2903, 2794])).
% 52.54/52.78  tff(2905,plain,
% 52.54/52.78      (sum(n1, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2904])).
% 52.54/52.78  tff(2906,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.54/52.78      inference(transitivity,[status(thm)],[2899, 161])).
% 52.54/52.78  tff(2907,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n10, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[431, 2790])).
% 52.54/52.78  tff(2908,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.54/52.78      inference(transitivity,[status(thm)],[2907, 161])).
% 52.54/52.78  tff(2909,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2908, 2906])).
% 52.54/52.78  tff(2910,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2909, 2905])).
% 52.54/52.78  tff(2911,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2910])).
% 52.54/52.78  tff(2912,plain,((~(X!1 = n11)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2913,plain,
% 52.54/52.78      (~(X!1 = n11)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2912, 2788])).
% 52.54/52.78  tff(2914,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[340, 2794])).
% 52.54/52.78  tff(2915,plain,
% 52.54/52.78      (sum(n3, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2914])).
% 52.54/52.78  tff(2916,plain,
% 52.54/52.78      (n4 = sum(n3, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[471])).
% 52.54/52.78  tff(2917,plain,
% 52.54/52.78      (sum(n10, n13) = n2),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2918,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n13)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 335])).
% 52.54/52.78  tff(2919,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.54/52.78      inference(transitivity,[status(thm)],[2918, 2917])).
% 52.54/52.78  tff(2920,plain,
% 52.54/52.78      (sum(n11, n12) = n2),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2921,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n11, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[338, 2790])).
% 52.54/52.78  tff(2922,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.54/52.78      inference(transitivity,[status(thm)],[2921, 2920])).
% 52.54/52.78  tff(2923,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2922, 2919])).
% 52.54/52.78  tff(2924,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2923, 583, 2916, 2915])).
% 52.54/52.78  tff(2925,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2924])).
% 52.54/52.78  tff(2926,plain,((~(X!1 = n12)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2927,plain,
% 52.54/52.78      (~(X!1 = n12)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2926, 2788])).
% 52.54/52.78  tff(2928,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1626, 2794])).
% 52.54/52.78  tff(2929,plain,
% 52.54/52.78      (sum(n5, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2928])).
% 52.54/52.78  tff(2930,plain,
% 52.54/52.78      (n6 = sum(n5, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[944])).
% 52.54/52.78  tff(2931,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n14)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 1622])).
% 52.54/52.78  tff(2932,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.54/52.78      inference(transitivity,[status(thm)],[2931, 1189])).
% 52.54/52.78  tff(2933,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n12, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[1624, 2790])).
% 52.54/52.78  tff(2934,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.54/52.78      inference(transitivity,[status(thm)],[2933, 123])).
% 52.54/52.78  tff(2935,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2934, 2932])).
% 52.54/52.78  tff(2936,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2935, 224, 2930, 2929])).
% 52.54/52.78  tff(2937,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2936])).
% 52.54/52.78  tff(2938,plain,((~(X!1 = n13)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2939,plain,
% 52.54/52.78      (~(X!1 = n13)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2938, 2788])).
% 52.54/52.78  tff(2940,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[915, 2794])).
% 52.54/52.78  tff(2941,plain,
% 52.54/52.78      (sum(n7, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2940])).
% 52.54/52.78  tff(2942,plain,
% 52.54/52.78      (sum(n7, n1) = n8),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2943,plain,
% 52.54/52.78      (n8 = sum(n7, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2942])).
% 52.54/52.78  tff(2944,plain,
% 52.54/52.78      (sum(n10, n15) = n4),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2945,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n15)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 911])).
% 52.54/52.78  tff(2946,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.54/52.78      inference(transitivity,[status(thm)],[2945, 2944])).
% 52.54/52.78  tff(2947,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n13, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[913, 2790])).
% 52.54/52.78  tff(2948,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.54/52.78      inference(transitivity,[status(thm)],[2947, 2159])).
% 52.54/52.78  tff(2949,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2948, 2946])).
% 52.54/52.78  tff(2950,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2949, 264, 2943, 2941])).
% 52.54/52.78  tff(2951,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2950])).
% 52.54/52.78  tff(2952,plain,((~(X!1 = n14)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2953,plain,
% 52.54/52.78      (~(X!1 = n14)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2952, 2788])).
% 52.54/52.78  tff(2954,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[70, 2794])).
% 52.54/52.78  tff(2955,plain,
% 52.54/52.78      (sum(n9, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(symmetry,[status(thm)],[2954])).
% 52.54/52.78  tff(2956,plain,
% 52.54/52.78      (sum(n9, n1) = n10),
% 52.54/52.78      inference(and_elim,[status(thm)],[9])).
% 52.54/52.78  tff(2957,plain,
% 52.54/52.78      (n10 = sum(n9, n1)),
% 52.54/52.78      inference(symmetry,[status(thm)],[2956])).
% 52.54/52.78  tff(2958,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = sum(n10, n16)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2792, 66])).
% 52.54/52.78  tff(2959,plain,
% 52.54/52.78      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.54/52.78      inference(transitivity,[status(thm)],[2958, 1915])).
% 52.54/52.78  tff(2960,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = sum(n14, n12)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[68, 2790])).
% 52.54/52.78  tff(2961,plain,
% 52.54/52.78      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.54/52.78      inference(transitivity,[status(thm)],[2960, 49])).
% 52.54/52.78  tff(2962,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2961, 2959])).
% 52.54/52.78  tff(2963,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.78      inference(transitivity,[status(thm)],[2962, 313, 2957, 2955])).
% 52.54/52.78  tff(2964,plain,
% 52.54/52.78      ($false),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[60, 2963])).
% 52.54/52.78  tff(2965,plain,((~(X!1 = n15)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.78  tff(2966,plain,
% 52.54/52.78      (~(X!1 = n15)),
% 52.54/52.78      inference(unit_resolution,[status(thm)],[2965, 2788])).
% 52.54/52.78  tff(2967,plain,
% 52.54/52.78      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n1)),
% 52.54/52.78      inference(monotonicity,[status(thm)],[2074, 2794])).
% 52.54/52.79  tff(2968,plain,
% 52.54/52.79      (sum(n13, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[2967])).
% 52.54/52.79  tff(2969,plain,
% 52.54/52.79      (sum(n13, n1) = n14),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(2970,plain,
% 52.54/52.79      (n14 = sum(n13, n1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2969])).
% 52.54/52.79  tff(2971,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n10, n18)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2792, 2070])).
% 52.54/52.79  tff(2972,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.54/52.79      inference(transitivity,[status(thm)],[2971, 190])).
% 52.54/52.79  tff(2973,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n16, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2072, 2790])).
% 52.54/52.79  tff(2974,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.54/52.79      inference(transitivity,[status(thm)],[2973, 567])).
% 52.54/52.79  tff(2975,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2974, 2972])).
% 52.54/52.79  tff(2976,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[2975, 405, 2970, 2968])).
% 52.54/52.79  tff(2977,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 2976])).
% 52.54/52.79  tff(2978,plain,((~(X!1 = n17)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(2979,plain,
% 52.54/52.79      (~(X!1 = n17)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[2978, 2788])).
% 52.54/52.79  tff(2980,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[642, 2794])).
% 52.54/52.79  tff(2981,plain,
% 52.54/52.79      (sum(n11, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[2980])).
% 52.54/52.79  tff(2982,plain,
% 52.54/52.79      (n12 = sum(n11, n1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[456])).
% 52.54/52.79  tff(2983,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n10, n17)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2792, 638])).
% 52.54/52.79  tff(2984,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.54/52.79      inference(transitivity,[status(thm)],[2983, 1503])).
% 52.54/52.79  tff(2985,plain,
% 52.54/52.79      (sum(n15, n12) = n6),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(2986,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n15, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[640, 2790])).
% 52.54/52.79  tff(2987,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.54/52.79      inference(transitivity,[status(thm)],[2986, 2985])).
% 52.54/52.79  tff(2988,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2987, 2984])).
% 52.54/52.79  tff(2989,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[2988, 127, 2982, 2981])).
% 52.54/52.79  tff(2990,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 2989])).
% 52.54/52.79  tff(2991,plain,((~(X!1 = n16)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(2992,plain,
% 52.54/52.79      (~(X!1 = n16)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[2991, 2788])).
% 52.54/52.79  tff(2993,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[772, 2794])).
% 52.54/52.79  tff(2994,plain,
% 52.54/52.79      (sum(n15, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[2993])).
% 52.54/52.79  tff(2995,plain,
% 52.54/52.79      (sum(n15, n1) = n16),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(2996,plain,
% 52.54/52.79      (n16 = sum(n15, n1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2995])).
% 52.54/52.79  tff(2997,plain,
% 52.54/52.79      (sum(n10, n19) = n8),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(2998,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n10, n19)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2792, 767])).
% 52.54/52.79  tff(2999,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.54/52.79      inference(transitivity,[status(thm)],[2998, 2997])).
% 52.54/52.79  tff(3000,plain,
% 52.54/52.79      (sum(n17, n12) = n8),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3001,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n17, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[770, 2790])).
% 52.54/52.79  tff(3002,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.54/52.79      inference(transitivity,[status(thm)],[3001, 3000])).
% 52.54/52.79  tff(3003,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3002, 2999])).
% 52.54/52.79  tff(3004,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3003, 209, 2996, 2994])).
% 52.54/52.79  tff(3005,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3004])).
% 52.54/52.79  tff(3006,plain,((~(X!1 = n18)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3007,plain,
% 52.54/52.79      (~(X!1 = n18)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3006, 2788])).
% 52.54/52.79  tff(3008,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2505, 2794])).
% 52.54/52.79  tff(3009,plain,
% 52.54/52.79      (sum(n19, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3008])).
% 52.54/52.79  tff(3010,plain,
% 52.54/52.79      (sum(n19, n1) = n20),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3011,plain,
% 52.54/52.79      (n20 = sum(n19, n1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[3010])).
% 52.54/52.79  tff(3012,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n10, n0)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2792, 2500])).
% 52.54/52.79  tff(3013,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.54/52.79      inference(transitivity,[status(thm)],[3012, 481])).
% 52.54/52.79  tff(3014,plain,
% 52.54/52.79      (sum(n19, n12) = n10),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3015,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n19, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2503, 2790])).
% 52.54/52.79  tff(3016,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.54/52.79      inference(transitivity,[status(thm)],[3015, 3014])).
% 52.54/52.79  tff(3017,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3016, 3013])).
% 52.54/52.79  tff(3018,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3017, 1358, 3011, 3009])).
% 52.54/52.79  tff(3019,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3018])).
% 52.54/52.79  tff(3020,plain,((~(X!1 = n20)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3021,plain,
% 52.54/52.79      (~(X!1 = n20)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3020, 2788])).
% 52.54/52.79  tff(3022,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2527, 2794])).
% 52.54/52.79  tff(3023,plain,
% 52.54/52.79      (sum(n17, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3022])).
% 52.54/52.79  tff(3024,plain,
% 52.54/52.79      (sum(n17, n1) = n18),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3025,plain,
% 52.54/52.79      (n18 = sum(n17, n1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[3024])).
% 52.54/52.79  tff(3026,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n10, n20)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2792, 2523])).
% 52.54/52.79  tff(3027,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.54/52.79      inference(transitivity,[status(thm)],[3026, 1597])).
% 52.54/52.79  tff(3028,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n18, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2525, 2790])).
% 52.54/52.79  tff(3029,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.54/52.79      inference(transitivity,[status(thm)],[3028, 1594])).
% 52.54/52.79  tff(3030,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3029, 3027])).
% 52.54/52.79  tff(3031,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3030, 1315, 3025, 3023])).
% 52.54/52.79  tff(3032,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3031])).
% 52.54/52.79  tff(3033,plain,((~(X!1 = n19)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3034,plain,
% 52.54/52.79      (~(X!1 = n19)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3033, 2788])).
% 52.54/52.79  tff(3035,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1690, 2794])).
% 52.54/52.79  tff(3036,plain,
% 52.54/52.79      (sum(n4, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3035])).
% 52.54/52.79  tff(3037,plain,
% 52.54/52.79      (n5 = sum(n4, n1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[486])).
% 52.54/52.79  tff(3038,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n10, n3)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[2792, 1686])).
% 52.54/52.79  tff(3039,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.54/52.79      inference(transitivity,[status(thm)],[3038, 842])).
% 52.54/52.79  tff(3040,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n1, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1688, 2790])).
% 52.54/52.79  tff(3041,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.54/52.79      inference(transitivity,[status(thm)],[3040, 839])).
% 52.54/52.79  tff(3042,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3041, 3039])).
% 52.54/52.79  tff(3043,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3042, 51, 3037, 3036])).
% 52.54/52.79  tff(3044,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3043])).
% 52.54/52.79  tff(3045,plain,((~(X!1 = n2)) | (~(Y!0 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3046,plain,
% 52.54/52.79      (~(X!1 = n2)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3045, 2788])).
% 52.54/52.79  tff(3047,assumption,(X!1 = n0), introduced(assumption)).
% 52.54/52.79  tff(3048,plain,
% 52.54/52.79      (succ(X!1) = succ(n0)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3047])).
% 52.54/52.79  tff(3049,plain,
% 52.54/52.79      (succ(X!1) = n1),
% 52.54/52.79      inference(transitivity,[status(thm)],[3048, 417])).
% 52.54/52.79  tff(3050,plain,
% 52.54/52.79      (pred(X!1) = pred(n0)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3047])).
% 52.54/52.79  tff(3051,plain,
% 52.54/52.79      (pred(X!1) = n20),
% 52.54/52.79      inference(transitivity,[status(thm)],[3050, 421])).
% 52.54/52.79  tff(3052,plain,
% 52.54/52.79      (sum(pred(X!1), succ(X!1)) = sum(n20, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 3049])).
% 52.54/52.79  tff(3053,plain,
% 52.54/52.79      (sum(pred(X!1), succ(X!1)) = n0),
% 52.54/52.79      inference(transitivity,[status(thm)],[3052, 416])).
% 52.54/52.79  tff(3054,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n3)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 1413])).
% 52.54/52.79  tff(3055,plain,
% 52.54/52.79      (sum(n0, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3054])).
% 52.54/52.79  tff(3056,plain,
% 52.54/52.79      (n3 = sum(n0, n3)),
% 52.54/52.79      inference(symmetry,[status(thm)],[1694])).
% 52.54/52.79  tff(3057,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n11, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1411, 3049])).
% 52.54/52.79  tff(3058,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.54/52.79      inference(transitivity,[status(thm)],[3057, 456])).
% 52.54/52.79  tff(3059,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n13)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 1409])).
% 52.54/52.79  tff(3060,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.54/52.79      inference(transitivity,[status(thm)],[3059, 453])).
% 52.54/52.79  tff(3061,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3060, 3058])).
% 52.54/52.79  tff(3062,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3061, 123, 3056, 3055])).
% 52.54/52.79  tff(3063,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3062])).
% 52.54/52.79  tff(3064,plain,((~(Y!0 = n12)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3065,plain,
% 52.54/52.79      (~(Y!0 = n12)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3064, 3047])).
% 52.54/52.79  tff(3066,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n20)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 1435])).
% 52.54/52.79  tff(3067,plain,
% 52.54/52.79      (sum(n0, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3066])).
% 52.54/52.79  tff(3068,plain,
% 52.54/52.79      (n20 = sum(n0, n20)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2767])).
% 52.54/52.79  tff(3069,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n9, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1433, 3049])).
% 52.54/52.79  tff(3070,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.54/52.79      inference(transitivity,[status(thm)],[3069, 2956])).
% 52.54/52.79  tff(3071,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n11)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 1431])).
% 52.54/52.79  tff(3072,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.54/52.79      inference(transitivity,[status(thm)],[3071, 311])).
% 52.54/52.79  tff(3073,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3072, 3070])).
% 52.54/52.79  tff(3074,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3073, 1358, 3068, 3067])).
% 52.54/52.79  tff(3075,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3074])).
% 52.54/52.79  tff(3076,plain,((~(Y!0 = n10)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3077,plain,
% 52.54/52.79      (~(Y!0 = n10)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3076, 3047])).
% 52.54/52.79  tff(3078,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n16)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 1898])).
% 52.54/52.79  tff(3079,plain,
% 52.54/52.79      (sum(n0, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3078])).
% 52.54/52.79  tff(3080,plain,
% 52.54/52.79      (n16 = sum(n0, n16)),
% 52.54/52.79      inference(symmetry,[status(thm)],[748])).
% 52.54/52.79  tff(3081,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n7, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1896, 3049])).
% 52.54/52.79  tff(3082,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.54/52.79      inference(transitivity,[status(thm)],[3081, 2942])).
% 52.54/52.79  tff(3083,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n9)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 1894])).
% 52.54/52.79  tff(3084,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.54/52.79      inference(transitivity,[status(thm)],[3083, 262])).
% 52.54/52.79  tff(3085,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3084, 3082])).
% 52.54/52.79  tff(3086,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3085, 209, 3080, 3079])).
% 52.54/52.79  tff(3087,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3086])).
% 52.54/52.79  tff(3088,plain,((~(Y!0 = n8)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3089,plain,
% 52.54/52.79      (~(Y!0 = n8)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3088, 3047])).
% 52.54/52.79  tff(3090,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n8)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 1477])).
% 52.54/52.79  tff(3091,plain,
% 52.54/52.79      (sum(n0, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3090])).
% 52.54/52.79  tff(3092,plain,
% 52.54/52.79      (n8 = sum(n0, n8)),
% 52.54/52.79      inference(symmetry,[status(thm)],[734])).
% 52.54/52.79  tff(3093,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n3, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1475, 3049])).
% 52.54/52.79  tff(3094,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.54/52.79      inference(transitivity,[status(thm)],[3093, 471])).
% 52.54/52.79  tff(3095,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n5)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 1473])).
% 52.54/52.79  tff(3096,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.54/52.79      inference(transitivity,[status(thm)],[3095, 468])).
% 52.54/52.79  tff(3097,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3096, 3094])).
% 52.54/52.79  tff(3098,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3097, 264, 3092, 3091])).
% 52.54/52.79  tff(3099,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3098])).
% 52.54/52.79  tff(3100,plain,((~(Y!0 = n4)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3101,plain,
% 52.54/52.79      (~(Y!0 = n4)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3100, 3047])).
% 52.54/52.79  tff(3102,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n4)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 797])).
% 52.54/52.79  tff(3103,plain,
% 52.54/52.79      (sum(n0, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3102])).
% 52.54/52.79  tff(3104,plain,
% 52.54/52.79      (sum(n0, n4) = n4),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3105,plain,
% 52.54/52.79      (n4 = sum(n0, n4)),
% 52.54/52.79      inference(symmetry,[status(thm)],[3104])).
% 52.54/52.79  tff(3106,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n1, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[795, 3049])).
% 52.54/52.79  tff(3107,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.54/52.79      inference(transitivity,[status(thm)],[3106, 599])).
% 52.54/52.79  tff(3108,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n3)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 792])).
% 52.54/52.79  tff(3109,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.54/52.79      inference(transitivity,[status(thm)],[3108, 1708])).
% 52.54/52.79  tff(3110,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3109, 3107])).
% 52.54/52.79  tff(3111,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3110, 583, 3105, 3103])).
% 52.54/52.79  tff(3112,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3111])).
% 52.54/52.79  tff(3113,plain,((~(Y!0 = n2)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3114,plain,
% 52.54/52.79      (~(Y!0 = n2)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3113, 3047])).
% 52.54/52.79  tff(3115,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n2)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 635])).
% 52.54/52.79  tff(3116,plain,
% 52.54/52.79      (sum(n0, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3115])).
% 52.54/52.79  tff(3117,plain,
% 52.54/52.79      (n2 = sum(n0, n2)),
% 52.54/52.79      inference(symmetry,[status(thm)],[626])).
% 52.54/52.79  tff(3118,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n0, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[633, 3049])).
% 52.54/52.79  tff(3119,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.54/52.79      inference(transitivity,[status(thm)],[3118, 2630])).
% 52.54/52.79  tff(3120,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n2)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 630])).
% 52.54/52.79  tff(3121,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.54/52.79      inference(transitivity,[status(thm)],[3120, 660])).
% 52.54/52.79  tff(3122,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3121, 3119])).
% 52.54/52.79  tff(3123,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3122, 599, 3117, 3116])).
% 52.54/52.79  tff(3124,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3123])).
% 52.54/52.79  tff(3125,plain,((~(Y!0 = n1)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3126,plain,
% 52.54/52.79      (~(Y!0 = n1)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3125, 3047])).
% 52.54/52.79  tff(3127,plain,
% 52.54/52.79      (succ(n0) = succ(X!1)),
% 52.54/52.79      inference(symmetry,[status(thm)],[3048])).
% 52.54/52.79  tff(3128,plain,
% 52.54/52.79      (succ(Y!0) = succ(X!1)),
% 52.54/52.79      inference(transitivity,[status(thm)],[419, 3127])).
% 52.54/52.79  tff(3129,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3128])).
% 52.54/52.79  tff(3130,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 420])).
% 52.54/52.79  tff(3131,plain,
% 52.54/52.79      (sum(n20, n1) = sum(pred(X!1), succ(Y!0))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3130])).
% 52.54/52.79  tff(3132,plain,
% 52.54/52.79      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3052, 3131])).
% 52.54/52.79  tff(3133,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3132, 3129])).
% 52.54/52.79  tff(3134,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3133])).
% 52.54/52.79  tff(3135,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3134])).
% 52.54/52.79  tff(3136,plain,((~(Y!0 = n0)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3137,plain,
% 52.54/52.79      (~(Y!0 = n0)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3136, 3047])).
% 52.54/52.79  tff(3138,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n5)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 332])).
% 52.54/52.79  tff(3139,plain,
% 52.54/52.79      (sum(n0, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3138])).
% 52.54/52.79  tff(3140,plain,
% 52.54/52.79      (n5 = sum(n0, n5)),
% 52.54/52.79      inference(symmetry,[status(thm)],[706])).
% 52.54/52.79  tff(3141,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n12, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[330, 3049])).
% 52.54/52.79  tff(3142,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.54/52.79      inference(transitivity,[status(thm)],[3141, 2835])).
% 52.54/52.79  tff(3143,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n14)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 327])).
% 52.54/52.79  tff(3144,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.54/52.79      inference(transitivity,[status(thm)],[3143, 1086])).
% 52.54/52.79  tff(3145,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3144, 3142])).
% 52.54/52.79  tff(3146,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3145, 51, 3140, 3139])).
% 52.54/52.79  tff(3147,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3146])).
% 52.54/52.79  tff(3148,plain,((~(Y!0 = n13)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3149,plain,
% 52.54/52.79      (~(Y!0 = n13)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3148, 3047])).
% 52.54/52.79  tff(3150,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n18)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 160])).
% 52.54/52.79  tff(3151,plain,
% 52.54/52.79      (sum(n0, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3150])).
% 52.54/52.79  tff(3152,plain,
% 52.54/52.79      (n18 = sum(n0, n18)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2091])).
% 52.54/52.79  tff(3153,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n8, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[158, 3049])).
% 52.54/52.79  tff(3154,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.54/52.79      inference(transitivity,[status(thm)],[3153, 2809])).
% 52.54/52.79  tff(3155,plain,
% 52.54/52.79      (sum(n20, n10) = n9),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3156,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n10)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 155])).
% 52.54/52.79  tff(3157,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.54/52.79      inference(transitivity,[status(thm)],[3156, 3155])).
% 52.54/52.79  tff(3158,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3157, 3154])).
% 52.54/52.79  tff(3159,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3158, 1315, 3152, 3151])).
% 52.54/52.79  tff(3160,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3159])).
% 52.54/52.79  tff(3161,plain,((~(Y!0 = n9)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3162,plain,
% 52.54/52.79      (~(Y!0 = n9)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3161, 3047])).
% 52.54/52.79  tff(3163,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n10)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 96])).
% 52.54/52.79  tff(3164,plain,
% 52.54/52.79      (sum(n0, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3163])).
% 52.54/52.79  tff(3165,plain,
% 52.54/52.79      (n10 = sum(n0, n10)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2656])).
% 52.54/52.79  tff(3166,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n4, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[94, 3049])).
% 52.54/52.79  tff(3167,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.54/52.79      inference(transitivity,[status(thm)],[3166, 486])).
% 52.54/52.79  tff(3168,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n6)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 91])).
% 52.54/52.79  tff(3169,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.54/52.79      inference(transitivity,[status(thm)],[3168, 483])).
% 52.54/52.79  tff(3170,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3169, 3167])).
% 52.54/52.79  tff(3171,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3170, 313, 3165, 3164])).
% 52.54/52.79  tff(3172,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3171])).
% 52.54/52.79  tff(3173,plain,((~(Y!0 = n5)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3174,plain,
% 52.54/52.79      (~(Y!0 = n5)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3173, 3047])).
% 52.54/52.79  tff(3175,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n12)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 34])).
% 52.54/52.79  tff(3176,plain,
% 52.54/52.79      (sum(n0, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3175])).
% 52.54/52.79  tff(3177,plain,
% 52.54/52.79      (n12 = sum(n0, n12)),
% 52.54/52.79      inference(symmetry,[status(thm)],[677])).
% 52.54/52.79  tff(3178,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n5, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[32, 3049])).
% 52.54/52.79  tff(3179,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.54/52.79      inference(transitivity,[status(thm)],[3178, 944])).
% 52.54/52.79  tff(3180,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n7)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 29])).
% 52.54/52.79  tff(3181,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.54/52.79      inference(transitivity,[status(thm)],[3180, 286])).
% 52.54/52.79  tff(3182,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3181, 3179])).
% 52.54/52.79  tff(3183,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3182, 127, 3177, 3176])).
% 52.54/52.79  tff(3184,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3183])).
% 52.54/52.79  tff(3185,plain,((~(Y!0 = n6)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3186,plain,
% 52.54/52.79      (~(Y!0 = n6)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3185, 3047])).
% 52.54/52.79  tff(3187,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n9)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 21])).
% 52.54/52.79  tff(3188,plain,
% 52.54/52.79      (sum(n0, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3187])).
% 52.54/52.79  tff(3189,plain,
% 52.54/52.79      (n9 = sum(n0, n9)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2582])).
% 52.54/52.79  tff(3190,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n14, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[19, 3049])).
% 52.54/52.79  tff(3191,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.54/52.79      inference(transitivity,[status(thm)],[3190, 517])).
% 52.54/52.79  tff(3192,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n16)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 16])).
% 52.54/52.79  tff(3193,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.54/52.79      inference(transitivity,[status(thm)],[3192, 514])).
% 52.54/52.79  tff(3194,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3193, 3191])).
% 52.54/52.79  tff(3195,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3194, 513, 3189, 3188])).
% 52.54/52.79  tff(3196,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3195])).
% 52.54/52.79  tff(3197,plain,((~(Y!0 = n15)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3198,plain,
% 52.54/52.79      (~(Y!0 = n15)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3197, 3047])).
% 52.54/52.79  tff(3199,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n7)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 283])).
% 52.54/52.79  tff(3200,plain,
% 52.54/52.79      (sum(n0, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3199])).
% 52.54/52.79  tff(3201,plain,
% 52.54/52.79      (n7 = sum(n0, n7)),
% 52.54/52.79      inference(symmetry,[status(thm)],[1038])).
% 52.54/52.79  tff(3202,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n13, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[281, 3049])).
% 52.54/52.79  tff(3203,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.54/52.79      inference(transitivity,[status(thm)],[3202, 2969])).
% 52.54/52.79  tff(3204,plain,
% 52.54/52.79      (sum(n20, n15) = n14),
% 52.54/52.79      inference(and_elim,[status(thm)],[9])).
% 52.54/52.79  tff(3205,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n15)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 278])).
% 52.54/52.79  tff(3206,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.54/52.79      inference(transitivity,[status(thm)],[3205, 3204])).
% 52.54/52.79  tff(3207,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3206, 3203])).
% 52.54/52.79  tff(3208,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3207, 192, 3201, 3200])).
% 52.54/52.79  tff(3209,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3208])).
% 52.54/52.79  tff(3210,plain,((~(Y!0 = n14)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3211,plain,
% 52.54/52.79      (~(Y!0 = n14)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3210, 3047])).
% 52.54/52.79  tff(3212,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n14)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 1055])).
% 52.54/52.79  tff(3213,plain,
% 52.54/52.79      (sum(n0, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3212])).
% 52.54/52.79  tff(3214,plain,
% 52.54/52.79      (n14 = sum(n0, n14)),
% 52.54/52.79      inference(symmetry,[status(thm)],[2643])).
% 52.54/52.79  tff(3215,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n6, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1053, 3049])).
% 52.54/52.79  tff(3216,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.54/52.79      inference(transitivity,[status(thm)],[3215, 501])).
% 52.54/52.79  tff(3217,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n8)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 1051])).
% 52.54/52.79  tff(3218,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.54/52.79      inference(transitivity,[status(thm)],[3217, 498])).
% 52.54/52.79  tff(3219,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3218, 3216])).
% 52.54/52.79  tff(3220,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3219, 405, 3214, 3213])).
% 52.54/52.79  tff(3221,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3220])).
% 52.54/52.79  tff(3222,plain,((~(Y!0 = n7)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3223,plain,
% 52.54/52.79      (~(Y!0 = n7)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3222, 3047])).
% 52.54/52.79  tff(3224,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n11)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 308])).
% 52.54/52.79  tff(3225,plain,
% 52.54/52.79      (sum(n0, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3224])).
% 52.54/52.79  tff(3226,plain,
% 52.54/52.79      (n11 = sum(n0, n11)),
% 52.54/52.79      inference(symmetry,[status(thm)],[662])).
% 52.54/52.79  tff(3227,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n15, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[306, 3049])).
% 52.54/52.79  tff(3228,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.54/52.79      inference(transitivity,[status(thm)],[3227, 2995])).
% 52.54/52.79  tff(3229,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n17)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 303])).
% 52.54/52.79  tff(3230,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.54/52.79      inference(transitivity,[status(thm)],[3229, 1577])).
% 52.54/52.79  tff(3231,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3230, 3228])).
% 52.54/52.79  tff(3232,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3231, 208, 3226, 3225])).
% 52.54/52.79  tff(3233,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3232])).
% 52.54/52.79  tff(3234,plain,((~(Y!0 = n16)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.79  tff(3235,plain,
% 52.54/52.79      (~(Y!0 = n16)),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[3234, 3047])).
% 52.54/52.79  tff(3236,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n13)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3053, 1392])).
% 52.54/52.79  tff(3237,plain,
% 52.54/52.79      (sum(n0, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(symmetry,[status(thm)],[3236])).
% 52.54/52.79  tff(3238,plain,
% 52.54/52.79      (n13 = sum(n0, n13)),
% 52.54/52.79      inference(symmetry,[status(thm)],[692])).
% 52.54/52.79  tff(3239,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = sum(n16, n1)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[1390, 3049])).
% 52.54/52.79  tff(3240,plain,
% 52.54/52.79      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.54/52.79      inference(transitivity,[status(thm)],[3239, 2109])).
% 52.54/52.79  tff(3241,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = sum(n20, n18)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3051, 1387])).
% 52.54/52.79  tff(3242,plain,
% 52.54/52.79      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.54/52.79      inference(transitivity,[status(thm)],[3241, 2106])).
% 52.54/52.79  tff(3243,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.54/52.79      inference(monotonicity,[status(thm)],[3242, 3240])).
% 52.54/52.79  tff(3244,plain,
% 52.54/52.79      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.79      inference(transitivity,[status(thm)],[3243, 358, 3238, 3237])).
% 52.54/52.79  tff(3245,plain,
% 52.54/52.79      ($false),
% 52.54/52.79      inference(unit_resolution,[status(thm)],[60, 3244])).
% 52.54/52.79  tff(3246,plain,((~(Y!0 = n17)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3247,plain,
% 52.54/52.80      (~(Y!0 = n17)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3246, 3047])).
% 52.54/52.80  tff(3248,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n15)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3053, 1456])).
% 52.54/52.80  tff(3249,plain,
% 52.54/52.80      (sum(n0, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3248])).
% 52.54/52.80  tff(3250,plain,
% 52.54/52.80      (n15 = sum(n0, n15)),
% 52.54/52.80      inference(symmetry,[status(thm)],[2705])).
% 52.54/52.80  tff(3251,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n17, n1)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1454, 3049])).
% 52.54/52.80  tff(3252,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.54/52.80      inference(transitivity,[status(thm)],[3251, 3024])).
% 52.54/52.80  tff(3253,plain,
% 52.54/52.80      (sum(n20, n19) = n18),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3254,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n20, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3051, 1452])).
% 52.54/52.80  tff(3255,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.54/52.80      inference(transitivity,[status(thm)],[3254, 3253])).
% 52.54/52.80  tff(3256,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3255, 3252])).
% 52.54/52.80  tff(3257,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3256, 374, 3250, 3249])).
% 52.54/52.80  tff(3258,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3257])).
% 52.54/52.80  tff(3259,plain,((~(Y!0 = n18)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3260,plain,
% 52.54/52.80      (~(Y!0 = n18)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3259, 3047])).
% 52.54/52.80  tff(3261,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n17)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3053, 1500])).
% 52.54/52.80  tff(3262,plain,
% 52.54/52.80      (sum(n0, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3261])).
% 52.54/52.80  tff(3263,plain,
% 52.54/52.80      (n17 = sum(n0, n17)),
% 52.54/52.80      inference(symmetry,[status(thm)],[647])).
% 52.54/52.80  tff(3264,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n18, n1)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1498, 3049])).
% 52.54/52.80  tff(3265,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.54/52.80      inference(transitivity,[status(thm)],[3264, 2874])).
% 52.54/52.80  tff(3266,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n20, n20)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3051, 1495])).
% 52.54/52.80  tff(3267,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.54/52.80      inference(transitivity,[status(thm)],[3266, 139])).
% 52.54/52.80  tff(3268,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3267, 3265])).
% 52.54/52.80  tff(3269,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3268, 776, 3263, 3262])).
% 52.54/52.80  tff(3270,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3269])).
% 52.54/52.80  tff(3271,plain,((~(Y!0 = n19)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3272,plain,
% 52.54/52.80      (~(Y!0 = n19)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3271, 3047])).
% 52.54/52.80  tff(3273,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n6)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3053, 2308])).
% 52.54/52.80  tff(3274,plain,
% 52.54/52.80      (sum(n0, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3273])).
% 52.54/52.80  tff(3275,plain,
% 52.54/52.80      (n6 = sum(n0, n6)),
% 52.54/52.80      inference(symmetry,[status(thm)],[719])).
% 52.54/52.80  tff(3276,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n2, n1)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[2306, 3049])).
% 52.54/52.80  tff(3277,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.54/52.80      inference(transitivity,[status(thm)],[3276, 1263])).
% 52.54/52.80  tff(3278,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n20, n4)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3051, 2304])).
% 52.54/52.80  tff(3279,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.54/52.80      inference(transitivity,[status(thm)],[3278, 822])).
% 52.54/52.80  tff(3280,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3279, 3277])).
% 52.54/52.80  tff(3281,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3280, 224, 3275, 3274])).
% 52.54/52.80  tff(3282,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3281])).
% 52.54/52.80  tff(3283,plain,((~(Y!0 = n3)) | (~(X!1 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3284,plain,
% 52.54/52.80      (~(Y!0 = n3)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3283, 3047])).
% 52.54/52.80  tff(3285,assumption,(Y!0 = n20), introduced(assumption)).
% 52.54/52.80  tff(3286,plain,
% 52.54/52.80      (succ(Y!0) = succ(n20)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3285])).
% 52.54/52.80  tff(3287,plain,
% 52.54/52.80      (succ(Y!0) = n0),
% 52.54/52.80      inference(transitivity,[status(thm)],[3286, 2497])).
% 52.54/52.80  tff(3288,plain,
% 52.54/52.80      (pred(Y!0) = pred(n20)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3285])).
% 52.54/52.80  tff(3289,plain,
% 52.54/52.80      (pred(Y!0) = n19),
% 52.54/52.80      inference(transitivity,[status(thm)],[3288, 2501])).
% 52.54/52.80  tff(3290,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(Y!0)) = sum(n19, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 3287])).
% 52.54/52.80  tff(3291,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(Y!0)) = n19),
% 52.54/52.80      inference(transitivity,[status(thm)],[3290, 2496])).
% 52.54/52.80  tff(3292,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1690, 3291])).
% 52.54/52.80  tff(3293,plain,
% 52.54/52.80      (sum(n4, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3292])).
% 52.54/52.80  tff(3294,plain,
% 52.54/52.80      (sum(n4, n19) = n2),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3295,plain,
% 52.54/52.80      (n2 = sum(n4, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3294])).
% 52.54/52.80  tff(3296,plain,
% 52.54/52.80      (sum(n19, n3) = n1),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3297,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n3)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 1686])).
% 52.54/52.80  tff(3298,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.54/52.80      inference(transitivity,[status(thm)],[3297, 3296])).
% 52.54/52.80  tff(3299,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n1, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1688, 3287])).
% 52.54/52.80  tff(3300,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.54/52.80      inference(transitivity,[status(thm)],[3299, 436])).
% 52.54/52.80  tff(3301,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3300, 3298])).
% 52.54/52.80  tff(3302,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3301, 599, 3295, 3293])).
% 52.54/52.80  tff(3303,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3302])).
% 52.54/52.80  tff(3304,plain,((~(X!1 = n2)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3305,plain,
% 52.54/52.80      (~(X!1 = n2)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3304, 3285])).
% 52.54/52.80  tff(3306,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1256, 3291])).
% 52.54/52.80  tff(3307,plain,
% 52.54/52.80      (sum(n6, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3306])).
% 52.54/52.80  tff(3308,plain,
% 52.54/52.80      (n4 = sum(n6, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[1209])).
% 52.54/52.80  tff(3309,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n4)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 1251])).
% 52.54/52.80  tff(3310,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.54/52.80      inference(transitivity,[status(thm)],[3309, 2513])).
% 52.54/52.80  tff(3311,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n2, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1254, 3287])).
% 52.54/52.80  tff(3312,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.54/52.80      inference(transitivity,[status(thm)],[3311, 2510])).
% 52.54/52.80  tff(3313,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3312, 3310])).
% 52.54/52.80  tff(3314,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3313, 583, 3308, 3307])).
% 52.54/52.80  tff(3315,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3314])).
% 52.54/52.80  tff(3316,plain,((~(X!1 = n3)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3317,plain,
% 52.54/52.80      (~(X!1 = n3)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3316, 3285])).
% 52.54/52.80  tff(3318,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[170, 3291])).
% 52.54/52.80  tff(3319,plain,
% 52.54/52.80      (sum(n8, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3318])).
% 52.54/52.80  tff(3320,plain,
% 52.54/52.80      (sum(n8, n19) = n6),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3321,plain,
% 52.54/52.80      (n6 = sum(n8, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3320])).
% 52.54/52.80  tff(3322,plain,
% 52.54/52.80      (sum(n19, n5) = n3),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3323,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n5)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 165])).
% 52.54/52.80  tff(3324,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.54/52.80      inference(transitivity,[status(thm)],[3323, 3322])).
% 52.54/52.80  tff(3325,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n3, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[168, 3287])).
% 52.54/52.80  tff(3326,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.54/52.80      inference(transitivity,[status(thm)],[3325, 451])).
% 52.54/52.80  tff(3327,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3326, 3324])).
% 52.54/52.80  tff(3328,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3327, 224, 3321, 3319])).
% 52.54/52.80  tff(3329,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3328])).
% 52.54/52.80  tff(3330,plain,((~(X!1 = n4)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3331,plain,
% 52.54/52.80      (~(X!1 = n4)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3330, 3285])).
% 52.54/52.80  tff(3332,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[187, 3291])).
% 52.54/52.80  tff(3333,plain,
% 52.54/52.80      (sum(n10, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3332])).
% 52.54/52.80  tff(3334,plain,
% 52.54/52.80      (n8 = sum(n10, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[2997])).
% 52.54/52.80  tff(3335,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n6)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 101])).
% 52.54/52.80  tff(3336,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.54/52.80      inference(transitivity,[status(thm)],[3335, 2508])).
% 52.54/52.80  tff(3337,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n4, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[111, 3287])).
% 52.54/52.80  tff(3338,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.54/52.80      inference(transitivity,[status(thm)],[3337, 1706])).
% 52.54/52.80  tff(3339,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3338, 3336])).
% 52.54/52.80  tff(3340,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3339, 264, 3334, 3333])).
% 52.54/52.80  tff(3341,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3340])).
% 52.54/52.80  tff(3342,plain,((~(X!1 = n5)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3343,plain,
% 52.54/52.80      (~(X!1 = n5)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3342, 3285])).
% 52.54/52.80  tff(3344,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[937, 3291])).
% 52.54/52.80  tff(3345,plain,
% 52.54/52.80      (sum(n12, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3344])).
% 52.54/52.80  tff(3346,plain,
% 52.54/52.80      (sum(n12, n19) = n10),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3347,plain,
% 52.54/52.80      (n10 = sum(n12, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3346])).
% 52.54/52.80  tff(3348,plain,
% 52.54/52.80      (sum(n19, n7) = n5),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3349,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n7)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 933])).
% 52.54/52.80  tff(3350,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.54/52.80      inference(transitivity,[status(thm)],[3349, 3348])).
% 52.54/52.80  tff(3351,plain,
% 52.54/52.80      (sum(n5, n0) = n5),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3352,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n5, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[935, 3287])).
% 52.54/52.80  tff(3353,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.54/52.80      inference(transitivity,[status(thm)],[3352, 3351])).
% 52.54/52.80  tff(3354,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3353, 3350])).
% 52.54/52.80  tff(3355,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3354, 313, 3347, 3345])).
% 52.54/52.80  tff(3356,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3355])).
% 52.54/52.80  tff(3357,plain,((~(X!1 = n6)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3358,plain,
% 52.54/52.80      (~(X!1 = n6)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3357, 3285])).
% 52.54/52.80  tff(3359,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[46, 3291])).
% 52.54/52.80  tff(3360,plain,
% 52.54/52.80      (sum(n14, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3359])).
% 52.54/52.80  tff(3361,plain,
% 52.54/52.80      (sum(n14, n19) = n12),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3362,plain,
% 52.54/52.80      (n12 = sum(n14, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3361])).
% 52.54/52.80  tff(3363,plain,
% 52.54/52.80      (sum(n19, n8) = n6),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3364,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n8)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 41])).
% 52.54/52.80  tff(3365,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.54/52.80      inference(transitivity,[status(thm)],[3364, 3363])).
% 52.54/52.80  tff(3366,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n6, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[44, 3287])).
% 52.54/52.80  tff(3367,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.54/52.80      inference(transitivity,[status(thm)],[3366, 1259])).
% 52.54/52.80  tff(3368,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3367, 3365])).
% 52.54/52.80  tff(3369,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3368, 127, 3362, 3360])).
% 52.54/52.80  tff(3370,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3369])).
% 52.54/52.80  tff(3371,plain,((~(X!1 = n7)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3372,plain,
% 52.54/52.80      (~(X!1 = n7)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3371, 3285])).
% 52.54/52.80  tff(3373,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[534, 3291])).
% 52.54/52.80  tff(3374,plain,
% 52.54/52.80      (sum(n16, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3373])).
% 52.54/52.80  tff(3375,plain,
% 52.54/52.80      (sum(n16, n19) = n14),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3376,plain,
% 52.54/52.80      (n14 = sum(n16, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3375])).
% 52.54/52.80  tff(3377,plain,
% 52.54/52.80      (sum(n19, n9) = n7),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3378,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n9)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 529])).
% 52.54/52.80  tff(3379,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.54/52.80      inference(transitivity,[status(thm)],[3378, 3377])).
% 52.54/52.80  tff(3380,plain,
% 52.54/52.80      (sum(n7, n0) = n7),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3381,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n7, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[532, 3287])).
% 52.54/52.80  tff(3382,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.54/52.80      inference(transitivity,[status(thm)],[3381, 3380])).
% 52.54/52.80  tff(3383,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3382, 3379])).
% 52.54/52.80  tff(3384,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3383, 405, 3376, 3374])).
% 52.54/52.80  tff(3385,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3384])).
% 52.54/52.80  tff(3386,plain,((~(X!1 = n8)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3387,plain,
% 52.54/52.80      (~(X!1 = n8)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3386, 3285])).
% 52.54/52.80  tff(3388,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[804, 3291])).
% 52.54/52.80  tff(3389,plain,
% 52.54/52.80      (sum(n18, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3388])).
% 52.54/52.80  tff(3390,plain,
% 52.54/52.80      (sum(n18, n19) = n16),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3391,plain,
% 52.54/52.80      (n16 = sum(n18, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3390])).
% 52.54/52.80  tff(3392,plain,
% 52.54/52.80      (sum(n19, n10) = n8),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3393,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n10)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 800])).
% 52.54/52.80  tff(3394,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.54/52.80      inference(transitivity,[status(thm)],[3393, 3392])).
% 52.54/52.80  tff(3395,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n8, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[802, 3287])).
% 52.54/52.80  tff(3396,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.54/52.80      inference(transitivity,[status(thm)],[3395, 466])).
% 52.54/52.80  tff(3397,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3396, 3394])).
% 52.54/52.80  tff(3398,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3397, 209, 3391, 3389])).
% 52.54/52.80  tff(3399,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3398])).
% 52.54/52.80  tff(3400,plain,((~(X!1 = n9)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3401,plain,
% 52.54/52.80      (~(X!1 = n9)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3400, 3285])).
% 52.54/52.80  tff(3402,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[244, 3291])).
% 52.54/52.80  tff(3403,plain,
% 52.54/52.80      (sum(n20, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3402])).
% 52.54/52.80  tff(3404,plain,
% 52.54/52.80      (n18 = sum(n20, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3253])).
% 52.54/52.80  tff(3405,plain,
% 52.54/52.80      (sum(n19, n11) = n9),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3406,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n11)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 239])).
% 52.54/52.80  tff(3407,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.54/52.80      inference(transitivity,[status(thm)],[3406, 3405])).
% 52.54/52.80  tff(3408,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n9, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[242, 3287])).
% 52.54/52.80  tff(3409,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.54/52.80      inference(transitivity,[status(thm)],[3408, 511])).
% 52.54/52.80  tff(3410,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3409, 3407])).
% 52.54/52.80  tff(3411,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3410, 1315, 3404, 3403])).
% 52.54/52.80  tff(3412,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3411])).
% 52.54/52.80  tff(3413,plain,((~(X!1 = n10)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3414,plain,
% 52.54/52.80      (~(X!1 = n10)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3413, 3285])).
% 52.54/52.80  tff(3415,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[433, 3291])).
% 52.54/52.80  tff(3416,plain,
% 52.54/52.80      (sum(n1, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3415])).
% 52.54/52.80  tff(3417,plain,
% 52.54/52.80      (n20 = sum(n1, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[1884])).
% 52.54/52.80  tff(3418,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n12)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 428])).
% 52.54/52.80  tff(3419,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.54/52.80      inference(transitivity,[status(thm)],[3418, 3014])).
% 52.54/52.80  tff(3420,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n10, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[431, 3287])).
% 52.54/52.80  tff(3421,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.54/52.80      inference(transitivity,[status(thm)],[3420, 481])).
% 52.54/52.80  tff(3422,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3421, 3419])).
% 52.54/52.80  tff(3423,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3422, 1358, 3417, 3416])).
% 52.54/52.80  tff(3424,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3423])).
% 52.54/52.80  tff(3425,plain,((~(X!1 = n11)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3426,plain,
% 52.54/52.80      (~(X!1 = n11)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3425, 3285])).
% 52.54/52.80  tff(3427,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[340, 3291])).
% 52.54/52.80  tff(3428,plain,
% 52.54/52.80      (sum(n3, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3427])).
% 52.54/52.80  tff(3429,plain,
% 52.54/52.80      (sum(n3, n19) = n1),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3430,plain,
% 52.54/52.80      (n1 = sum(n3, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3429])).
% 52.54/52.80  tff(3431,plain,
% 52.54/52.80      (sum(n19, n13) = n11),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3432,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n13)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 335])).
% 52.54/52.80  tff(3433,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.54/52.80      inference(transitivity,[status(thm)],[3432, 3431])).
% 52.54/52.80  tff(3434,plain,
% 52.54/52.80      (sum(n11, n0) = n11),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3435,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n11, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[338, 3287])).
% 52.54/52.80  tff(3436,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.54/52.80      inference(transitivity,[status(thm)],[3435, 3434])).
% 52.54/52.80  tff(3437,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3436, 3433])).
% 52.54/52.80  tff(3438,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3437, 438, 3430, 3428])).
% 52.54/52.80  tff(3439,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3438])).
% 52.54/52.80  tff(3440,plain,((~(X!1 = n12)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3441,plain,
% 52.54/52.80      (~(X!1 = n12)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3440, 3285])).
% 52.54/52.80  tff(3442,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1626, 3291])).
% 52.54/52.80  tff(3443,plain,
% 52.54/52.80      (sum(n5, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3442])).
% 52.54/52.80  tff(3444,plain,
% 52.54/52.80      (sum(n5, n19) = n3),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3445,plain,
% 52.54/52.80      (n3 = sum(n5, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3444])).
% 52.54/52.80  tff(3446,plain,
% 52.54/52.80      (sum(n19, n14) = n12),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3447,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n14)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 1622])).
% 52.54/52.80  tff(3448,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.54/52.80      inference(transitivity,[status(thm)],[3447, 3446])).
% 52.54/52.80  tff(3449,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n12, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[1624, 3287])).
% 52.54/52.80  tff(3450,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.54/52.80      inference(transitivity,[status(thm)],[3449, 940])).
% 52.54/52.80  tff(3451,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3450, 3448])).
% 52.54/52.80  tff(3452,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3451, 123, 3445, 3443])).
% 52.54/52.80  tff(3453,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3452])).
% 52.54/52.80  tff(3454,plain,((~(X!1 = n13)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3455,plain,
% 52.54/52.80      (~(X!1 = n13)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3454, 3285])).
% 52.54/52.80  tff(3456,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[915, 3291])).
% 52.54/52.80  tff(3457,plain,
% 52.54/52.80      (sum(n7, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3456])).
% 52.54/52.80  tff(3458,plain,
% 52.54/52.80      (sum(n7, n19) = n5),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3459,plain,
% 52.54/52.80      (n5 = sum(n7, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3458])).
% 52.54/52.80  tff(3460,plain,
% 52.54/52.80      (sum(n19, n15) = n13),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3461,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n15)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 911])).
% 52.54/52.80  tff(3462,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.54/52.80      inference(transitivity,[status(thm)],[3461, 3460])).
% 52.54/52.80  tff(3463,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n13, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[913, 3287])).
% 52.54/52.80  tff(3464,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.54/52.80      inference(transitivity,[status(thm)],[3463, 2104])).
% 52.54/52.80  tff(3465,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3464, 3462])).
% 52.54/52.80  tff(3466,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3465, 51, 3459, 3457])).
% 52.54/52.80  tff(3467,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3466])).
% 52.54/52.80  tff(3468,plain,((~(X!1 = n14)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3469,plain,
% 52.54/52.80      (~(X!1 = n14)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3468, 3285])).
% 52.54/52.80  tff(3470,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[70, 3291])).
% 52.54/52.80  tff(3471,plain,
% 52.54/52.80      (sum(n9, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3470])).
% 52.54/52.80  tff(3472,plain,
% 52.54/52.80      (sum(n9, n19) = n7),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3473,plain,
% 52.54/52.80      (n7 = sum(n9, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3472])).
% 52.54/52.80  tff(3474,plain,
% 52.54/52.80      (sum(n19, n16) = n14),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3475,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n16)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 66])).
% 52.54/52.80  tff(3476,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.54/52.80      inference(transitivity,[status(thm)],[3475, 3474])).
% 52.54/52.80  tff(3477,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n14, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[68, 3287])).
% 52.54/52.80  tff(3478,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.54/52.80      inference(transitivity,[status(thm)],[3477, 496])).
% 52.54/52.80  tff(3479,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3478, 3476])).
% 52.54/52.80  tff(3480,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3479, 192, 3473, 3471])).
% 52.54/52.80  tff(3481,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3480])).
% 52.54/52.80  tff(3482,plain,((~(X!1 = n15)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3483,plain,
% 52.54/52.80      (~(X!1 = n15)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3482, 3285])).
% 52.54/52.80  tff(3484,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[2074, 3291])).
% 52.54/52.80  tff(3485,plain,
% 52.54/52.80      (sum(n13, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3484])).
% 52.54/52.80  tff(3486,plain,
% 52.54/52.80      (sum(n13, n19) = n11),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3487,plain,
% 52.54/52.80      (n11 = sum(n13, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3486])).
% 52.54/52.80  tff(3488,plain,
% 52.54/52.80      (sum(n19, n18) = n16),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3489,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n18)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 2070])).
% 52.54/52.80  tff(3490,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.54/52.80      inference(transitivity,[status(thm)],[3489, 3488])).
% 52.54/52.80  tff(3491,plain,
% 52.54/52.80      (sum(n16, n0) = n16),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3492,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n16, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[2072, 3287])).
% 52.54/52.80  tff(3493,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.54/52.80      inference(transitivity,[status(thm)],[3492, 3491])).
% 52.54/52.80  tff(3494,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3493, 3490])).
% 52.54/52.80  tff(3495,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3494, 208, 3487, 3485])).
% 52.54/52.80  tff(3496,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3495])).
% 52.54/52.80  tff(3497,plain,((~(X!1 = n17)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3498,plain,
% 52.54/52.80      (~(X!1 = n17)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3497, 3285])).
% 52.54/52.80  tff(3499,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[642, 3291])).
% 52.54/52.80  tff(3500,plain,
% 52.54/52.80      (sum(n11, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3499])).
% 52.54/52.80  tff(3501,plain,
% 52.54/52.80      (sum(n11, n19) = n9),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3502,plain,
% 52.54/52.80      (n9 = sum(n11, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3501])).
% 52.54/52.80  tff(3503,plain,
% 52.54/52.80      (sum(n19, n17) = n15),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3504,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n17)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 638])).
% 52.54/52.80  tff(3505,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.54/52.80      inference(transitivity,[status(thm)],[3504, 3503])).
% 52.54/52.80  tff(3506,plain,
% 52.54/52.80      (sum(n15, n0) = n15),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3507,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n15, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[640, 3287])).
% 52.54/52.80  tff(3508,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.54/52.80      inference(transitivity,[status(thm)],[3507, 3506])).
% 52.54/52.80  tff(3509,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3508, 3505])).
% 52.54/52.80  tff(3510,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3509, 513, 3502, 3500])).
% 52.54/52.80  tff(3511,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3510])).
% 52.54/52.80  tff(3512,plain,((~(X!1 = n16)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3513,plain,
% 52.54/52.80      (~(X!1 = n16)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3512, 3285])).
% 52.54/52.80  tff(3514,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[772, 3291])).
% 52.54/52.80  tff(3515,plain,
% 52.54/52.80      (sum(n15, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(symmetry,[status(thm)],[3514])).
% 52.54/52.80  tff(3516,plain,
% 52.54/52.80      (sum(n15, n19) = n13),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3517,plain,
% 52.54/52.80      (n13 = sum(n15, n19)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3516])).
% 52.54/52.80  tff(3518,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n19)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 767])).
% 52.54/52.80  tff(3519,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.54/52.80      inference(transitivity,[status(thm)],[3518, 776])).
% 52.54/52.80  tff(3520,plain,
% 52.54/52.80      (sum(n17, n0) = n17),
% 52.54/52.80      inference(and_elim,[status(thm)],[9])).
% 52.54/52.80  tff(3521,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = sum(n17, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[770, 3287])).
% 52.54/52.80  tff(3522,plain,
% 52.54/52.80      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.54/52.80      inference(transitivity,[status(thm)],[3521, 3520])).
% 52.54/52.80  tff(3523,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3522, 3519])).
% 52.54/52.80  tff(3524,plain,
% 52.54/52.80      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.80      inference(transitivity,[status(thm)],[3523, 358, 3517, 3515])).
% 52.54/52.80  tff(3525,plain,
% 52.54/52.80      ($false),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[60, 3524])).
% 52.54/52.80  tff(3526,plain,((~(X!1 = n18)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.80  tff(3527,plain,
% 52.54/52.80      (~(X!1 = n18)),
% 52.54/52.80      inference(unit_resolution,[status(thm)],[3526, 3285])).
% 52.54/52.80  tff(3528,plain,
% 52.54/52.80      (sum(pred(Y!0), succ(X!1)) = sum(n19, n0)),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3289, 2500])).
% 52.54/52.80  tff(3529,plain,
% 52.54/52.80      (pred(n20) = pred(Y!0)),
% 52.54/52.80      inference(symmetry,[status(thm)],[3288])).
% 52.54/52.80  tff(3530,plain,
% 52.54/52.80      (pred(X!1) = pred(Y!0)),
% 52.54/52.80      inference(transitivity,[status(thm)],[2502, 3529])).
% 52.54/52.80  tff(3531,plain,
% 52.54/52.80      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.54/52.80      inference(monotonicity,[status(thm)],[3530])).
% 52.54/52.80  tff(3532,plain,
% 52.54/52.80      (sum(pred(X!1), succ(X!1)) = n19),
% 52.54/52.80      inference(transitivity,[status(thm)],[3531, 3528, 2496])).
% 52.54/52.81  tff(3533,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3532, 3291])).
% 52.54/52.81  tff(3534,plain,
% 52.54/52.81      (sum(n19, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3533])).
% 52.54/52.81  tff(3535,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.54/52.81      inference(transitivity,[status(thm)],[3528, 2496])).
% 52.54/52.81  tff(3536,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n19, n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2503, 3287])).
% 52.54/52.81  tff(3537,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.54/52.81      inference(transitivity,[status(thm)],[3536, 2496])).
% 52.54/52.81  tff(3538,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3537, 3535])).
% 52.54/52.81  tff(3539,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3538, 3534])).
% 52.54/52.81  tff(3540,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3539])).
% 52.54/52.81  tff(3541,plain,((~(X!1 = n20)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3542,plain,
% 52.54/52.81      (~(X!1 = n20)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3541, 3285])).
% 52.54/52.81  tff(3543,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2527, 3291])).
% 52.54/52.81  tff(3544,plain,
% 52.54/52.81      (sum(n17, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3543])).
% 52.54/52.81  tff(3545,plain,
% 52.54/52.81      (n15 = sum(n17, n19)),
% 52.54/52.81      inference(symmetry,[status(thm)],[763])).
% 52.54/52.81  tff(3546,plain,
% 52.54/52.81      (sum(n19, n20) = n18),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3547,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n19, n20)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3289, 2523])).
% 52.54/52.81  tff(3548,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.54/52.81      inference(transitivity,[status(thm)],[3547, 3546])).
% 52.54/52.81  tff(3549,plain,
% 52.54/52.81      (sum(n18, n0) = n18),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3550,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n18, n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2525, 3287])).
% 52.54/52.81  tff(3551,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.54/52.81      inference(transitivity,[status(thm)],[3550, 3549])).
% 52.54/52.81  tff(3552,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3551, 3548])).
% 52.54/52.81  tff(3553,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3552, 374, 3545, 3544])).
% 52.54/52.81  tff(3554,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3553])).
% 52.54/52.81  tff(3555,plain,((~(X!1 = n19)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3556,plain,
% 52.54/52.81      (~(X!1 = n19)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3555, 3285])).
% 52.54/52.81  tff(3557,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2563, 3291])).
% 52.54/52.81  tff(3558,plain,
% 52.54/52.81      (sum(n2, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3557])).
% 52.54/52.81  tff(3559,plain,
% 52.54/52.81      (n0 = sum(n2, n19)),
% 52.54/52.81      inference(symmetry,[status(thm)],[1463])).
% 52.54/52.81  tff(3560,plain,
% 52.54/52.81      (sum(n19, n2) = n0),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3561,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n19, n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3289, 2559])).
% 52.54/52.81  tff(3562,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.54/52.81      inference(transitivity,[status(thm)],[3561, 3560])).
% 52.54/52.81  tff(3563,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n0, n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2561, 3287])).
% 52.54/52.81  tff(3564,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.54/52.81      inference(transitivity,[status(thm)],[3563, 75])).
% 52.54/52.81  tff(3565,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3564, 3562])).
% 52.54/52.81  tff(3566,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3565, 75, 3559, 3558])).
% 52.54/52.81  tff(3567,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3566])).
% 52.54/52.81  tff(3568,plain,((~(X!1 = n1)) | (~(Y!0 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3569,plain,
% 52.54/52.81      (~(X!1 = n1)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3568, 3285])).
% 52.54/52.81  tff(3570,plain,
% 52.54/52.81      ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2) | (X!1 = n1) | (X!1 = n0)),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3571,plain,
% 52.54/52.81      (X!1 = n0),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3570, 3569, 3556, 3542, 3527, 3513, 3498, 3483, 3469, 3455, 3441, 3426, 3414, 3401, 3387, 3372, 3358, 3343, 3331, 3317, 3305])).
% 52.54/52.81  tff(3572,plain,
% 52.54/52.81      (succ(X!1) = succ(n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3571])).
% 52.54/52.81  tff(3573,plain,
% 52.54/52.81      (succ(X!1) = n1),
% 52.54/52.81      inference(transitivity,[status(thm)],[3572, 417])).
% 52.54/52.81  tff(3574,plain,
% 52.54/52.81      (pred(X!1) = pred(n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3571])).
% 52.54/52.81  tff(3575,plain,
% 52.54/52.81      (pred(X!1) = n20),
% 52.54/52.81      inference(transitivity,[status(thm)],[3574, 421])).
% 52.54/52.81  tff(3576,plain,
% 52.54/52.81      (sum(pred(X!1), succ(X!1)) = sum(n20, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3575, 3573])).
% 52.54/52.81  tff(3577,plain,
% 52.54/52.81      (sum(pred(X!1), succ(X!1)) = n0),
% 52.54/52.81      inference(transitivity,[status(thm)],[3576, 416])).
% 52.54/52.81  tff(3578,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3577, 3291])).
% 52.54/52.81  tff(3579,plain,
% 52.54/52.81      (sum(n0, n19) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3578])).
% 52.54/52.81  tff(3580,plain,
% 52.54/52.81      (n19 = sum(n0, n19)),
% 52.54/52.81      inference(symmetry,[status(thm)],[777])).
% 52.54/52.81  tff(3581,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n19, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3289, 3573])).
% 52.54/52.81  tff(3582,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.54/52.81      inference(transitivity,[status(thm)],[3581, 3010])).
% 52.54/52.81  tff(3583,plain,
% 52.54/52.81      (sum(n20, n0) = n20),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3584,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n20, n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3575, 3287])).
% 52.54/52.81  tff(3585,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.54/52.81      inference(transitivity,[status(thm)],[3584, 3583])).
% 52.54/52.81  tff(3586,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3585, 3582])).
% 52.54/52.81  tff(3587,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3586, 139, 3580, 3579])).
% 52.54/52.81  tff(3588,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3587])).
% 52.54/52.81  tff(3589,plain,(~(Y!0 = n20)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3590,plain,
% 52.54/52.81      ((Y!0 = n20) | (Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n11) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3591,plain,
% 52.54/52.81      ((Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n11) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3590, 3589])).
% 52.54/52.81  tff(3592,plain,
% 52.54/52.81      (Y!0 = n11),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3591, 3284, 3272, 3260, 3247, 3235, 3223, 3211, 3198, 3186, 3174, 3162, 3149, 3137, 3126, 3114, 3101, 3089, 3077, 3065])).
% 52.54/52.81  tff(3593,plain,
% 52.54/52.81      (succ(Y!0) = succ(n11)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3592])).
% 52.54/52.81  tff(3594,plain,
% 52.54/52.81      (succ(Y!0) = n12),
% 52.54/52.81      inference(transitivity,[status(thm)],[3593, 162])).
% 52.54/52.81  tff(3595,plain,
% 52.54/52.81      (pred(Y!0) = pred(n11)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3592])).
% 52.54/52.81  tff(3596,plain,
% 52.54/52.81      (pred(Y!0) = n10),
% 52.54/52.81      inference(transitivity,[status(thm)],[3595, 429])).
% 52.54/52.81  tff(3597,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(Y!0)) = sum(n10, n12)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3596, 3594])).
% 52.54/52.81  tff(3598,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(Y!0)) = n1),
% 52.54/52.81      inference(transitivity,[status(thm)],[3597, 161])).
% 52.54/52.81  tff(3599,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n0, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3053, 3598])).
% 52.54/52.81  tff(3600,plain,
% 52.54/52.81      (sum(n0, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3599])).
% 52.54/52.81  tff(3601,plain,
% 52.54/52.81      (n1 = sum(n0, n1)),
% 52.54/52.81      inference(symmetry,[status(thm)],[2630])).
% 52.54/52.81  tff(3602,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n10, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3596, 3049])).
% 52.54/52.81  tff(3603,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.54/52.81      inference(transitivity,[status(thm)],[3602, 441])).
% 52.54/52.81  tff(3604,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n20, n12)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3051, 3594])).
% 52.54/52.81  tff(3605,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.54/52.81      inference(transitivity,[status(thm)],[3604, 247])).
% 52.54/52.81  tff(3606,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3605, 3603])).
% 52.54/52.81  tff(3607,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3606, 438, 3601, 3600])).
% 52.54/52.81  tff(3608,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3607])).
% 52.54/52.81  tff(3609,plain,(~(X!1 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3610,plain,
% 52.54/52.81      ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2) | (X!1 = n1)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3570, 3609])).
% 52.54/52.81  tff(3611,plain,
% 52.54/52.81      (X!1 = n1),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3610, 3046, 3034, 3021, 3007, 2992, 2979, 2966, 2953, 2939, 2927, 2913, 2898, 2885, 2871, 2859, 2847, 2832, 2820, 2806])).
% 52.54/52.81  tff(3612,plain,
% 52.54/52.81      (succ(X!1) = succ(n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3611])).
% 52.54/52.81  tff(3613,plain,
% 52.54/52.81      (succ(X!1) = n2),
% 52.54/52.81      inference(transitivity,[status(thm)],[3612, 627])).
% 52.54/52.81  tff(3614,plain,
% 52.54/52.81      (pred(X!1) = pred(n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3611])).
% 52.54/52.81  tff(3615,plain,
% 52.54/52.81      (pred(X!1) = n0),
% 52.54/52.81      inference(transitivity,[status(thm)],[3614, 631])).
% 52.54/52.81  tff(3616,plain,
% 52.54/52.81      (sum(pred(X!1), succ(X!1)) = sum(n0, n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3615, 3613])).
% 52.54/52.81  tff(3617,plain,
% 52.54/52.81      (sum(pred(X!1), succ(X!1)) = n2),
% 52.54/52.81      inference(transitivity,[status(thm)],[3616, 626])).
% 52.54/52.81  tff(3618,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3617, 2794])).
% 52.54/52.81  tff(3619,plain,
% 52.54/52.81      (sum(n2, n1) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3618])).
% 52.54/52.81  tff(3620,plain,
% 52.54/52.81      (n3 = sum(n2, n1)),
% 52.54/52.81      inference(symmetry,[status(thm)],[1263])).
% 52.54/52.81  tff(3621,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n10, n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2792, 3613])).
% 52.54/52.81  tff(3622,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.54/52.81      inference(transitivity,[status(thm)],[3621, 680])).
% 52.54/52.81  tff(3623,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n0, n12)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3615, 2790])).
% 52.54/52.81  tff(3624,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.54/52.81      inference(transitivity,[status(thm)],[3623, 677])).
% 52.54/52.81  tff(3625,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3624, 3622])).
% 52.54/52.81  tff(3626,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3625, 123, 3620, 3619])).
% 52.54/52.81  tff(3627,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3626])).
% 52.54/52.81  tff(3628,plain,(~(Y!0 = n11)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3629,plain,
% 52.54/52.81      ((Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n3) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3591, 3628])).
% 52.54/52.81  tff(3630,plain,
% 52.54/52.81      (Y!0 = n3),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3629, 2787, 2774, 2760, 2748, 2736, 2724, 2712, 2699, 2687, 2675, 2663, 2650, 2637, 2624, 2613, 2601, 2589, 2575])).
% 52.54/52.81  tff(3631,plain,
% 52.54/52.81      (succ(Y!0) = succ(n3)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3630])).
% 52.54/52.81  tff(3632,plain,
% 52.54/52.81      (succ(Y!0) = n4),
% 52.54/52.81      inference(transitivity,[status(thm)],[3631, 1249])).
% 52.54/52.81  tff(3633,plain,
% 52.54/52.81      (pred(Y!0) = pred(n3)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3630])).
% 52.54/52.81  tff(3634,plain,
% 52.54/52.81      (pred(Y!0) = n2),
% 52.54/52.81      inference(transitivity,[status(thm)],[3633, 1252])).
% 52.54/52.81  tff(3635,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(Y!0)) = sum(n2, n4)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3634, 3632])).
% 52.54/52.81  tff(3636,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(Y!0)) = n6),
% 52.54/52.81      inference(transitivity,[status(thm)],[3635, 1248])).
% 52.54/52.81  tff(3637,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n2, n6)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2563, 3636])).
% 52.54/52.81  tff(3638,plain,
% 52.54/52.81      (sum(n2, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3637])).
% 52.54/52.81  tff(3639,plain,
% 52.54/52.81      (n8 = sum(n2, n6)),
% 52.54/52.81      inference(symmetry,[status(thm)],[1304])).
% 52.54/52.81  tff(3640,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n2, n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3634, 2559])).
% 52.54/52.81  tff(3641,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.54/52.81      inference(transitivity,[status(thm)],[3640, 583])).
% 52.54/52.81  tff(3642,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n0, n4)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2561, 3632])).
% 52.54/52.81  tff(3643,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.54/52.81      inference(transitivity,[status(thm)],[3642, 3104])).
% 52.54/52.81  tff(3644,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3643, 3641])).
% 52.54/52.81  tff(3645,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3644, 264, 3639, 3638])).
% 52.54/52.81  tff(3646,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3645])).
% 52.54/52.81  tff(3647,plain,(~(X!1 = n1)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3648,plain,
% 52.54/52.81      ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3610, 3647])).
% 52.54/52.81  tff(3649,plain,
% 52.54/52.81      (X!1 = n2),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3648, 2556, 2541, 2520, 2495, 2482, 2469, 2456, 2443, 2431, 2419, 2406, 2393, 2381, 2369, 2357, 2345, 2333, 2320])).
% 52.54/52.81  tff(3650,plain,
% 52.54/52.81      (succ(X!1) = succ(n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3649])).
% 52.54/52.81  tff(3651,plain,
% 52.54/52.81      (succ(X!1) = n3),
% 52.54/52.81      inference(transitivity,[status(thm)],[3650, 789])).
% 52.54/52.81  tff(3652,plain,
% 52.54/52.81      (pred(X!1) = pred(n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3649])).
% 52.54/52.81  tff(3653,plain,
% 52.54/52.81      (pred(X!1) = n1),
% 52.54/52.81      inference(transitivity,[status(thm)],[3652, 793])).
% 52.54/52.81  tff(3654,plain,
% 52.54/52.81      (sum(pred(X!1), succ(X!1)) = sum(n1, n3)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3653, 3651])).
% 52.54/52.81  tff(3655,plain,
% 52.54/52.81      (sum(pred(X!1), succ(X!1)) = n4),
% 52.54/52.81      inference(transitivity,[status(thm)],[3654, 788])).
% 52.54/52.81  tff(3656,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n6)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3655, 2308])).
% 52.54/52.81  tff(3657,plain,
% 52.54/52.81      (sum(n4, n6) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3656])).
% 52.54/52.81  tff(3658,plain,
% 52.54/52.81      (n10 = sum(n4, n6)),
% 52.54/52.81      inference(symmetry,[status(thm)],[87])).
% 52.54/52.81  tff(3659,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n2, n3)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2306, 3651])).
% 52.54/52.81  tff(3660,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.54/52.81      inference(transitivity,[status(thm)],[3659, 2777])).
% 52.54/52.81  tff(3661,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n1, n4)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3653, 2304])).
% 52.54/52.81  tff(3662,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.54/52.81      inference(transitivity,[status(thm)],[3661, 837])).
% 52.54/52.81  tff(3663,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3662, 3660])).
% 52.54/52.81  tff(3664,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3663, 313, 3658, 3657])).
% 52.54/52.81  tff(3665,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3664])).
% 52.54/52.81  tff(3666,plain,(~(Y!0 = n3)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3667,plain,
% 52.54/52.81      ((Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n8) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3629, 3666])).
% 52.54/52.81  tff(3668,plain,
% 52.54/52.81      (Y!0 = n18),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3667, 2301, 2287, 2273, 2261, 2247, 2236, 2223, 2209, 2196, 2182, 2170, 2156, 2142, 2129, 2116, 2101, 2086])).
% 52.54/52.81  tff(3669,plain,
% 52.54/52.81      (succ(Y!0) = succ(n18)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3668])).
% 52.54/52.81  tff(3670,plain,
% 52.54/52.81      (succ(Y!0) = n19),
% 52.54/52.81      inference(transitivity,[status(thm)],[3669, 764])).
% 52.54/52.81  tff(3671,plain,
% 52.54/52.81      (pred(Y!0) = pred(n18)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3668])).
% 52.54/52.81  tff(3672,plain,
% 52.54/52.81      (pred(Y!0) = n17),
% 52.54/52.81      inference(transitivity,[status(thm)],[3671, 768])).
% 52.54/52.81  tff(3673,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(Y!0)) = sum(n17, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3672, 3670])).
% 52.54/52.81  tff(3674,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(Y!0)) = n15),
% 52.54/52.81      inference(transitivity,[status(thm)],[3673, 763])).
% 52.54/52.81  tff(3675,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n13, n15)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2074, 3674])).
% 52.54/52.81  tff(3676,plain,
% 52.54/52.81      (sum(n13, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3675])).
% 52.54/52.81  tff(3677,plain,
% 52.54/52.81      (n7 = sum(n13, n15)),
% 52.54/52.81      inference(symmetry,[status(thm)],[10])).
% 52.54/52.81  tff(3678,plain,
% 52.54/52.81      (sum(n17, n18) = n14),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3679,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n17, n18)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3672, 2070])).
% 52.54/52.81  tff(3680,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.54/52.81      inference(transitivity,[status(thm)],[3679, 3678])).
% 52.54/52.81  tff(3681,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n16, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[2072, 3670])).
% 52.54/52.81  tff(3682,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.54/52.81      inference(transitivity,[status(thm)],[3681, 3375])).
% 52.54/52.81  tff(3683,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3682, 3680])).
% 52.54/52.81  tff(3684,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3683, 192, 3677, 3676])).
% 52.54/52.81  tff(3685,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3684])).
% 52.54/52.81  tff(3686,plain,(~(X!1 = n17)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3687,assumption,(~(X!1 = n4)), introduced(assumption)).
% 52.54/52.81  tff(3688,assumption,(~(X!1 = n5)), introduced(assumption)).
% 52.54/52.81  tff(3689,assumption,(~(X!1 = n6)), introduced(assumption)).
% 52.54/52.81  tff(3690,assumption,(~(X!1 = n7)), introduced(assumption)).
% 52.54/52.81  tff(3691,assumption,(~(X!1 = n8)), introduced(assumption)).
% 52.54/52.81  tff(3692,assumption,(~(X!1 = n9)), introduced(assumption)).
% 52.54/52.81  tff(3693,assumption,(~(X!1 = n10)), introduced(assumption)).
% 52.54/52.81  tff(3694,assumption,(~(X!1 = n11)), introduced(assumption)).
% 52.54/52.81  tff(3695,assumption,(~(X!1 = n12)), introduced(assumption)).
% 52.54/52.81  tff(3696,assumption,(~(X!1 = n14)), introduced(assumption)).
% 52.54/52.81  tff(3697,assumption,(~(X!1 = n15)), introduced(assumption)).
% 52.54/52.81  tff(3698,assumption,(~(X!1 = n3)), introduced(assumption)).
% 52.54/52.81  tff(3699,assumption,(~(X!1 = n2)), introduced(assumption)).
% 52.54/52.81  tff(3700,assumption,(~(X!1 = n17)), introduced(assumption)).
% 52.54/52.81  tff(3701,assumption,(~(Y!0 = n18)), introduced(assumption)).
% 52.54/52.81  tff(3702,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n8)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 1477])).
% 52.54/52.81  tff(3703,plain,
% 52.54/52.81      (sum(n15, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3702])).
% 52.54/52.81  tff(3704,plain,
% 52.54/52.81      (n2 = sum(n15, n8)),
% 52.54/52.81      inference(symmetry,[status(thm)],[1164])).
% 52.54/52.81  tff(3705,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n3, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[1475, 767])).
% 52.54/52.81  tff(3706,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.54/52.81      inference(transitivity,[status(thm)],[3705, 3429])).
% 52.54/52.81  tff(3707,plain,
% 52.54/52.81      (sum(n17, n5) = n1),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3708,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n17, n5)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[770, 1473])).
% 52.54/52.81  tff(3709,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.54/52.81      inference(transitivity,[status(thm)],[3708, 3707])).
% 52.54/52.81  tff(3710,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3709, 3706])).
% 52.54/52.81  tff(3711,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3710, 599, 3704, 3703])).
% 52.54/52.81  tff(3712,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3711])).
% 52.54/52.81  tff(3713,plain,((~(Y!0 = n4)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3714,plain,
% 52.54/52.81      (~(Y!0 = n4)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3713, 765])).
% 52.54/52.81  tff(3715,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n4)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 797])).
% 52.54/52.81  tff(3716,plain,
% 52.54/52.81      (sum(n15, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3715])).
% 52.54/52.81  tff(3717,plain,
% 52.54/52.81      (n19 = sum(n15, n4)),
% 52.54/52.81      inference(symmetry,[status(thm)],[1373])).
% 52.54/52.81  tff(3718,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n1, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[795, 767])).
% 52.54/52.81  tff(3719,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.54/52.81      inference(transitivity,[status(thm)],[3718, 1884])).
% 52.54/52.81  tff(3720,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n17, n3)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[770, 792])).
% 52.54/52.81  tff(3721,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.54/52.81      inference(transitivity,[status(thm)],[3720, 1881])).
% 52.54/52.81  tff(3722,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3721, 3719])).
% 52.54/52.81  tff(3723,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3722, 139, 3717, 3716])).
% 52.54/52.81  tff(3724,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3723])).
% 52.54/52.81  tff(3725,plain,((~(Y!0 = n2)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3726,plain,
% 52.54/52.81      (~(Y!0 = n2)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3725, 765])).
% 52.54/52.81  tff(3727,plain,
% 52.54/52.81      (~(Y!0 = n1)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[786, 765])).
% 52.54/52.81  tff(3728,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n0)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 425])).
% 52.54/52.81  tff(3729,plain,
% 52.54/52.81      (sum(n15, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3728])).
% 52.54/52.81  tff(3730,plain,
% 52.54/52.81      (n15 = sum(n15, n0)),
% 52.54/52.81      inference(symmetry,[status(thm)],[3506])).
% 52.54/52.81  tff(3731,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n20, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[423, 767])).
% 52.54/52.81  tff(3732,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.54/52.81      inference(transitivity,[status(thm)],[3731, 3253])).
% 52.54/52.81  tff(3733,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n17, n1)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[770, 420])).
% 52.54/52.81  tff(3734,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.54/52.81      inference(transitivity,[status(thm)],[3733, 3024])).
% 52.54/52.81  tff(3735,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3734, 3732])).
% 52.54/52.81  tff(3736,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3735, 374, 3730, 3729])).
% 52.54/52.81  tff(3737,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3736])).
% 52.54/52.81  tff(3738,plain,((~(Y!0 = n0)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3739,plain,
% 52.54/52.81      (~(Y!0 = n0)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3738, 765])).
% 52.54/52.81  tff(3740,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n5)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 332])).
% 52.54/52.81  tff(3741,plain,
% 52.54/52.81      (sum(n15, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3740])).
% 52.54/52.81  tff(3742,plain,
% 52.54/52.81      (sum(n15, n5) = n20),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3743,plain,
% 52.54/52.81      (n20 = sum(n15, n5)),
% 52.54/52.81      inference(symmetry,[status(thm)],[3742])).
% 52.54/52.81  tff(3744,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n12, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[330, 767])).
% 52.54/52.81  tff(3745,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.54/52.81      inference(transitivity,[status(thm)],[3744, 3346])).
% 52.54/52.81  tff(3746,plain,
% 52.54/52.81      (sum(n17, n14) = n10),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3747,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n17, n14)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[770, 327])).
% 52.54/52.81  tff(3748,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.54/52.81      inference(transitivity,[status(thm)],[3747, 3746])).
% 52.54/52.81  tff(3749,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3748, 3745])).
% 52.54/52.81  tff(3750,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3749, 1358, 3743, 3741])).
% 52.54/52.81  tff(3751,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3750])).
% 52.54/52.81  tff(3752,plain,((~(Y!0 = n13)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3753,plain,
% 52.54/52.81      (~(Y!0 = n13)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3752, 765])).
% 52.54/52.81  tff(3754,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n18)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 160])).
% 52.54/52.81  tff(3755,plain,
% 52.54/52.81      (sum(n15, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3754])).
% 52.54/52.81  tff(3756,plain,
% 52.54/52.81      (n12 = sum(n15, n18)),
% 52.54/52.81      inference(symmetry,[status(thm)],[2227])).
% 52.54/52.81  tff(3757,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n8, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[158, 767])).
% 52.54/52.81  tff(3758,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.54/52.81      inference(transitivity,[status(thm)],[3757, 3320])).
% 52.54/52.81  tff(3759,plain,
% 52.54/52.81      (sum(n17, n10) = n6),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3760,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n17, n10)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[770, 155])).
% 52.54/52.81  tff(3761,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.54/52.81      inference(transitivity,[status(thm)],[3760, 3759])).
% 52.54/52.81  tff(3762,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3761, 3758])).
% 52.54/52.81  tff(3763,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3762, 127, 3756, 3755])).
% 52.54/52.81  tff(3764,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3763])).
% 52.54/52.81  tff(3765,plain,((~(Y!0 = n9)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3766,plain,
% 52.54/52.81      (~(Y!0 = n9)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3765, 765])).
% 52.54/52.81  tff(3767,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n10)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 96])).
% 52.54/52.81  tff(3768,plain,
% 52.54/52.81      (sum(n15, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3767])).
% 52.54/52.81  tff(3769,plain,
% 52.54/52.81      (sum(n15, n10) = n4),
% 52.54/52.81      inference(and_elim,[status(thm)],[9])).
% 52.54/52.81  tff(3770,plain,
% 52.54/52.81      (n4 = sum(n15, n10)),
% 52.54/52.81      inference(symmetry,[status(thm)],[3769])).
% 52.54/52.81  tff(3771,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = sum(n4, n19)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[94, 767])).
% 52.54/52.81  tff(3772,plain,
% 52.54/52.81      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.54/52.81      inference(transitivity,[status(thm)],[3771, 3294])).
% 52.54/52.81  tff(3773,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = sum(n17, n6)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[770, 91])).
% 52.54/52.81  tff(3774,plain,
% 52.54/52.81      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.54/52.81      inference(transitivity,[status(thm)],[3773, 2530])).
% 52.54/52.81  tff(3775,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[3774, 3772])).
% 52.54/52.81  tff(3776,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(transitivity,[status(thm)],[3775, 583, 3770, 3768])).
% 52.54/52.81  tff(3777,plain,
% 52.54/52.81      ($false),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[60, 3776])).
% 52.54/52.81  tff(3778,plain,((~(Y!0 = n5)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.81  tff(3779,plain,
% 52.54/52.81      (~(Y!0 = n5)),
% 52.54/52.81      inference(unit_resolution,[status(thm)],[3778, 765])).
% 52.54/52.81  tff(3780,plain,
% 52.54/52.81      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n12)),
% 52.54/52.81      inference(monotonicity,[status(thm)],[772, 34])).
% 52.54/52.81  tff(3781,plain,
% 52.54/52.81      (sum(n15, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.81      inference(symmetry,[status(thm)],[3780])).
% 52.54/52.82  tff(3782,plain,
% 52.54/52.82      (n6 = sum(n15, n12)),
% 52.54/52.82      inference(symmetry,[status(thm)],[2985])).
% 52.54/52.82  tff(3783,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n5, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[32, 767])).
% 52.54/52.82  tff(3784,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.54/52.82      inference(transitivity,[status(thm)],[3783, 3444])).
% 52.54/52.82  tff(3785,plain,
% 52.54/52.82      (sum(n17, n7) = n3),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3786,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n7)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 29])).
% 52.54/52.82  tff(3787,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.54/52.82      inference(transitivity,[status(thm)],[3786, 3785])).
% 52.54/52.82  tff(3788,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3787, 3784])).
% 52.54/52.82  tff(3789,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3788, 224, 3782, 3781])).
% 52.54/52.82  tff(3790,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3789])).
% 52.54/52.82  tff(3791,plain,((~(Y!0 = n6)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3792,plain,
% 52.54/52.82      (~(Y!0 = n6)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3791, 765])).
% 52.54/52.82  tff(3793,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n9)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 21])).
% 52.54/52.82  tff(3794,plain,
% 52.54/52.82      (sum(n15, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3793])).
% 52.54/52.82  tff(3795,plain,
% 52.54/52.82      (n3 = sum(n15, n9)),
% 52.54/52.82      inference(symmetry,[status(thm)],[615])).
% 52.54/52.82  tff(3796,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n14, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[19, 767])).
% 52.54/52.82  tff(3797,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.54/52.82      inference(transitivity,[status(thm)],[3796, 3361])).
% 52.54/52.82  tff(3798,plain,
% 52.54/52.82      (sum(n17, n16) = n12),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3799,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n16)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 16])).
% 52.54/52.82  tff(3800,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.54/52.82      inference(transitivity,[status(thm)],[3799, 3798])).
% 52.54/52.82  tff(3801,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3800, 3797])).
% 52.54/52.82  tff(3802,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3801, 123, 3795, 3794])).
% 52.54/52.82  tff(3803,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3802])).
% 52.54/52.82  tff(3804,plain,((~(Y!0 = n15)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3805,plain,
% 52.54/52.82      (~(Y!0 = n15)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3804, 765])).
% 52.54/52.82  tff(3806,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n7)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 283])).
% 52.54/52.82  tff(3807,plain,
% 52.54/52.82      (sum(n15, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3806])).
% 52.54/52.82  tff(3808,plain,
% 52.54/52.82      (sum(n15, n7) = n1),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3809,plain,
% 52.54/52.82      (n1 = sum(n15, n7)),
% 52.54/52.82      inference(symmetry,[status(thm)],[3808])).
% 52.54/52.82  tff(3810,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n13, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[281, 767])).
% 52.54/52.82  tff(3811,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.54/52.82      inference(transitivity,[status(thm)],[3810, 3486])).
% 52.54/52.82  tff(3812,plain,
% 52.54/52.82      (sum(n17, n15) = n11),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3813,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n15)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 278])).
% 52.54/52.82  tff(3814,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.54/52.82      inference(transitivity,[status(thm)],[3813, 3812])).
% 52.54/52.82  tff(3815,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3814, 3811])).
% 52.54/52.82  tff(3816,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3815, 438, 3809, 3807])).
% 52.54/52.82  tff(3817,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3816])).
% 52.54/52.82  tff(3818,plain,((~(Y!0 = n14)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3819,plain,
% 52.54/52.82      (~(Y!0 = n14)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3818, 765])).
% 52.54/52.82  tff(3820,plain,
% 52.54/52.82      (~(Y!0 = n7)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[1218, 765])).
% 52.54/52.82  tff(3821,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n11)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 308])).
% 52.54/52.82  tff(3822,plain,
% 52.54/52.82      (sum(n15, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3821])).
% 52.54/52.82  tff(3823,plain,
% 52.54/52.82      (n5 = sum(n15, n11)),
% 52.54/52.82      inference(symmetry,[status(thm)],[314])).
% 52.54/52.82  tff(3824,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n15, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[306, 767])).
% 52.54/52.82  tff(3825,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.54/52.82      inference(transitivity,[status(thm)],[3824, 3516])).
% 52.54/52.82  tff(3826,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n17)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 303])).
% 52.54/52.82  tff(3827,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.54/52.82      inference(transitivity,[status(thm)],[3826, 358])).
% 52.54/52.82  tff(3828,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3827, 3825])).
% 52.54/52.82  tff(3829,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3828, 51, 3823, 3822])).
% 52.54/52.82  tff(3830,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3829])).
% 52.54/52.82  tff(3831,plain,((~(Y!0 = n16)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3832,plain,
% 52.54/52.82      (~(Y!0 = n16)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3831, 765])).
% 52.54/52.82  tff(3833,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n13)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 1392])).
% 52.54/52.82  tff(3834,plain,
% 52.54/52.82      (sum(n15, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3833])).
% 52.54/52.82  tff(3835,plain,
% 52.54/52.82      (sum(n15, n13) = n7),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3836,plain,
% 52.54/52.82      (n7 = sum(n15, n13)),
% 52.54/52.82      inference(symmetry,[status(thm)],[3835])).
% 52.54/52.82  tff(3837,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n16, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[1390, 767])).
% 52.54/52.82  tff(3838,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.54/52.82      inference(transitivity,[status(thm)],[3837, 3375])).
% 52.54/52.82  tff(3839,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n18)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 1387])).
% 52.54/52.82  tff(3840,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.54/52.82      inference(transitivity,[status(thm)],[3839, 3678])).
% 52.54/52.82  tff(3841,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3840, 3838])).
% 52.54/52.82  tff(3842,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3841, 192, 3836, 3834])).
% 52.54/52.82  tff(3843,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3842])).
% 52.54/52.82  tff(3844,plain,((~(Y!0 = n17)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3845,plain,
% 52.54/52.82      (~(Y!0 = n17)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3844, 765])).
% 52.54/52.82  tff(3846,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n3)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 1413])).
% 52.54/52.82  tff(3847,plain,
% 52.54/52.82      (sum(n15, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3846])).
% 52.54/52.82  tff(3848,plain,
% 52.54/52.82      (n18 = sum(n15, n3)),
% 52.54/52.82      inference(symmetry,[status(thm)],[1828])).
% 52.54/52.82  tff(3849,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n11, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[1411, 767])).
% 52.54/52.82  tff(3850,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.54/52.82      inference(transitivity,[status(thm)],[3849, 3501])).
% 52.54/52.82  tff(3851,plain,
% 52.54/52.82      (sum(n17, n13) = n9),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3852,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n13)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 1409])).
% 52.54/52.82  tff(3853,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.54/52.82      inference(transitivity,[status(thm)],[3852, 3851])).
% 52.54/52.82  tff(3854,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3853, 3850])).
% 52.54/52.82  tff(3855,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3854, 1315, 3848, 3847])).
% 52.54/52.82  tff(3856,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3855])).
% 52.54/52.82  tff(3857,plain,((~(Y!0 = n12)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3858,plain,
% 52.54/52.82      (~(Y!0 = n12)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3857, 765])).
% 52.54/52.82  tff(3859,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n20)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 1435])).
% 52.54/52.82  tff(3860,plain,
% 52.54/52.82      (sum(n15, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3859])).
% 52.54/52.82  tff(3861,plain,
% 52.54/52.82      (sum(n15, n20) = n14),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3862,plain,
% 52.54/52.82      (n14 = sum(n15, n20)),
% 52.54/52.82      inference(symmetry,[status(thm)],[3861])).
% 52.54/52.82  tff(3863,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n9, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[1433, 767])).
% 52.54/52.82  tff(3864,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.54/52.82      inference(transitivity,[status(thm)],[3863, 3472])).
% 52.54/52.82  tff(3865,plain,
% 52.54/52.82      (sum(n17, n11) = n7),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3866,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n11)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 1431])).
% 52.54/52.82  tff(3867,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.54/52.82      inference(transitivity,[status(thm)],[3866, 3865])).
% 52.54/52.82  tff(3868,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3867, 3864])).
% 52.54/52.82  tff(3869,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3868, 405, 3862, 3860])).
% 52.54/52.82  tff(3870,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3869])).
% 52.54/52.82  tff(3871,plain,((~(Y!0 = n10)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3872,plain,
% 52.54/52.82      (~(Y!0 = n10)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3871, 765])).
% 52.54/52.82  tff(3873,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n16)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 1898])).
% 52.54/52.82  tff(3874,plain,
% 52.54/52.82      (sum(n15, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3873])).
% 52.54/52.82  tff(3875,plain,
% 52.54/52.82      (sum(n15, n16) = n10),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3876,plain,
% 52.54/52.82      (n10 = sum(n15, n16)),
% 52.54/52.82      inference(symmetry,[status(thm)],[3875])).
% 52.54/52.82  tff(3877,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n7, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[1896, 767])).
% 52.54/52.82  tff(3878,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.54/52.82      inference(transitivity,[status(thm)],[3877, 3458])).
% 52.54/52.82  tff(3879,plain,
% 52.54/52.82      (sum(n17, n9) = n5),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3880,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n9)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 1894])).
% 52.54/52.82  tff(3881,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.54/52.82      inference(transitivity,[status(thm)],[3880, 3879])).
% 52.54/52.82  tff(3882,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3881, 3878])).
% 52.54/52.82  tff(3883,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3882, 313, 3876, 3874])).
% 52.54/52.82  tff(3884,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3883])).
% 52.54/52.82  tff(3885,plain,((~(Y!0 = n8)) | (~(X!1 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3886,plain,
% 52.54/52.82      (~(Y!0 = n8)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3885, 765])).
% 52.54/52.82  tff(3887,plain,
% 52.54/52.82      (Y!0 = n19),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3667, 3886, 3701, 3872, 3858, 3845, 3832, 3820, 3819, 3805, 3792, 3779, 3766, 3753, 3739, 3727, 3726, 3714])).
% 52.54/52.82  tff(3888,plain,
% 52.54/52.82      (succ(Y!0) = succ(n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3887])).
% 52.54/52.82  tff(3889,plain,
% 52.54/52.82      (succ(Y!0) = n20),
% 52.54/52.82      inference(transitivity,[status(thm)],[3888, 1492])).
% 52.54/52.82  tff(3890,plain,
% 52.54/52.82      (pred(Y!0) = pred(n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3887])).
% 52.54/52.82  tff(3891,plain,
% 52.54/52.82      (pred(Y!0) = n18),
% 52.54/52.82      inference(transitivity,[status(thm)],[3890, 1496])).
% 52.54/52.82  tff(3892,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(Y!0)) = sum(n18, n20)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3891, 3889])).
% 52.54/52.82  tff(3893,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(Y!0)) = n17),
% 52.54/52.82      inference(transitivity,[status(thm)],[3892, 1491])).
% 52.54/52.82  tff(3894,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n17)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[772, 3893])).
% 52.54/52.82  tff(3895,plain,
% 52.54/52.82      (sum(n15, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3894])).
% 52.54/52.82  tff(3896,plain,
% 52.54/52.82      (n11 = sum(n15, n17)),
% 52.54/52.82      inference(symmetry,[status(thm)],[299])).
% 52.54/52.82  tff(3897,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n18, n19)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3891, 767])).
% 52.54/52.82  tff(3898,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.54/52.82      inference(transitivity,[status(thm)],[3897, 3390])).
% 52.54/52.82  tff(3899,plain,
% 52.54/52.82      (sum(n17, n20) = n16),
% 52.54/52.82      inference(and_elim,[status(thm)],[9])).
% 52.54/52.82  tff(3900,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n17, n20)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[770, 3889])).
% 52.54/52.82  tff(3901,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.54/52.82      inference(transitivity,[status(thm)],[3900, 3899])).
% 52.54/52.82  tff(3902,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3901, 3898])).
% 52.54/52.82  tff(3903,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3902, 208, 3896, 3895])).
% 52.54/52.82  tff(3904,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3903])).
% 52.54/52.82  tff(3905,plain,((~(X!1 = n18)) | (Y!0 = n18)), inference(lemma,lemma(discharge,[]))).
% 52.54/52.82  tff(3906,plain,
% 52.54/52.82      (~(X!1 = n18)),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[3905, 3701])).
% 52.54/52.82  tff(3907,assumption,(~(X!1 = n16)), introduced(assumption)).
% 52.54/52.82  tff(3908,assumption,(~(X!1 = n18)), introduced(assumption)).
% 52.54/52.82  tff(3909,assumption,(~(Y!0 = n19)), introduced(assumption)).
% 52.54/52.82  tff(3910,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n16)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[2527, 1898])).
% 52.54/52.82  tff(3911,plain,
% 52.54/52.82      (sum(n17, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(symmetry,[status(thm)],[3910])).
% 52.54/52.82  tff(3912,plain,
% 52.54/52.82      (n12 = sum(n17, n16)),
% 52.54/52.82      inference(symmetry,[status(thm)],[3798])).
% 52.54/52.82  tff(3913,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n7, n20)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[1896, 2523])).
% 52.54/52.82  tff(3914,plain,
% 52.54/52.82      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.54/52.82      inference(transitivity,[status(thm)],[3913, 1552])).
% 52.54/52.82  tff(3915,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n9)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[2525, 1894])).
% 52.54/52.82  tff(3916,plain,
% 52.54/52.82      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.54/52.82      inference(transitivity,[status(thm)],[3915, 1549])).
% 52.54/52.82  tff(3917,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.54/52.82      inference(monotonicity,[status(thm)],[3916, 3914])).
% 52.54/52.82  tff(3918,plain,
% 52.54/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.54/52.82      inference(transitivity,[status(thm)],[3917, 127, 3912, 3911])).
% 52.54/52.82  tff(3919,plain,
% 52.54/52.82      ($false),
% 52.54/52.82      inference(unit_resolution,[status(thm)],[60, 3918])).
% 52.54/52.82  tff(3920,plain,((~(Y!0 = n8)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3921,plain,
% 52.59/52.82      (~(Y!0 = n8)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3920, 2521])).
% 52.59/52.82  tff(3922,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n8)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 1477])).
% 52.59/52.82  tff(3923,plain,
% 52.59/52.82      (sum(n17, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3922])).
% 52.59/52.82  tff(3924,plain,
% 52.59/52.82      (n4 = sum(n17, n8)),
% 52.59/52.82      inference(symmetry,[status(thm)],[1212])).
% 52.59/52.82  tff(3925,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n3, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[1475, 2523])).
% 52.59/52.82  tff(3926,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.59/52.82      inference(transitivity,[status(thm)],[3925, 1676])).
% 52.59/52.82  tff(3927,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n5)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 1473])).
% 52.59/52.82  tff(3928,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.59/52.82      inference(transitivity,[status(thm)],[3927, 1673])).
% 52.59/52.82  tff(3929,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[3928, 3926])).
% 52.59/52.82  tff(3930,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[3929, 583, 3924, 3923])).
% 52.59/52.82  tff(3931,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 3930])).
% 52.59/52.82  tff(3932,plain,((~(Y!0 = n4)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3933,plain,
% 52.59/52.82      (~(Y!0 = n4)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3932, 2521])).
% 52.59/52.82  tff(3934,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n4)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 797])).
% 52.59/52.82  tff(3935,plain,
% 52.59/52.82      (sum(n17, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3934])).
% 52.59/52.82  tff(3936,plain,
% 52.59/52.82      (n0 = sum(n17, n4)),
% 52.59/52.82      inference(symmetry,[status(thm)],[1460])).
% 52.59/52.82  tff(3937,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n1, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[795, 2523])).
% 52.59/52.82  tff(3938,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.59/52.82      inference(transitivity,[status(thm)],[3937, 1803])).
% 52.59/52.82  tff(3939,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n3)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 792])).
% 52.59/52.82  tff(3940,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.59/52.82      inference(transitivity,[status(thm)],[3939, 1800])).
% 52.59/52.82  tff(3941,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[3940, 3938])).
% 52.59/52.82  tff(3942,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[3941, 75, 3936, 3935])).
% 52.59/52.82  tff(3943,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 3942])).
% 52.59/52.82  tff(3944,plain,((~(Y!0 = n2)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3945,plain,
% 52.59/52.82      (~(Y!0 = n2)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3944, 2521])).
% 52.59/52.82  tff(3946,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n2)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 635])).
% 52.59/52.82  tff(3947,plain,
% 52.59/52.82      (sum(n17, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3946])).
% 52.59/52.82  tff(3948,plain,
% 52.59/52.82      (n19 = sum(n17, n2)),
% 52.59/52.82      inference(symmetry,[status(thm)],[780])).
% 52.59/52.82  tff(3949,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n0, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[633, 2523])).
% 52.59/52.82  tff(3950,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.59/52.82      inference(transitivity,[status(thm)],[3949, 2767])).
% 52.59/52.82  tff(3951,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n2)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 630])).
% 52.59/52.82  tff(3952,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.59/52.82      inference(transitivity,[status(thm)],[3951, 2764])).
% 52.59/52.82  tff(3953,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[3952, 3950])).
% 52.59/52.82  tff(3954,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[3953, 139, 3948, 3947])).
% 52.59/52.82  tff(3955,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 3954])).
% 52.59/52.82  tff(3956,plain,((~(Y!0 = n1)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3957,plain,
% 52.59/52.82      (~(Y!0 = n1)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3956, 2521])).
% 52.59/52.82  tff(3958,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n0)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 425])).
% 52.59/52.82  tff(3959,plain,
% 52.59/52.82      (sum(n17, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3958])).
% 52.59/52.82  tff(3960,plain,
% 52.59/52.82      (n17 = sum(n17, n0)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3520])).
% 52.59/52.82  tff(3961,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n20, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[423, 2523])).
% 52.59/52.82  tff(3962,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.59/52.82      inference(transitivity,[status(thm)],[3961, 139])).
% 52.59/52.82  tff(3963,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n1)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 420])).
% 52.59/52.82  tff(3964,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.59/52.82      inference(transitivity,[status(thm)],[3963, 2874])).
% 52.59/52.82  tff(3965,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[3964, 3962])).
% 52.59/52.82  tff(3966,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[3965, 776, 3960, 3959])).
% 52.59/52.82  tff(3967,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 3966])).
% 52.59/52.82  tff(3968,plain,((~(Y!0 = n0)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3969,plain,
% 52.59/52.82      (~(Y!0 = n0)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3968, 2521])).
% 52.59/52.82  tff(3970,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n5)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 332])).
% 52.59/52.82  tff(3971,plain,
% 52.59/52.82      (sum(n17, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3970])).
% 52.59/52.82  tff(3972,plain,
% 52.59/52.82      (n1 = sum(n17, n5)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3707])).
% 52.59/52.82  tff(3973,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n12, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[330, 2523])).
% 52.59/52.82  tff(3974,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.59/52.82      inference(transitivity,[status(thm)],[3973, 1633])).
% 52.59/52.82  tff(3975,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n14)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 327])).
% 52.59/52.82  tff(3976,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.59/52.82      inference(transitivity,[status(thm)],[3975, 1073])).
% 52.59/52.82  tff(3977,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[3976, 3974])).
% 52.59/52.82  tff(3978,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[3977, 438, 3972, 3971])).
% 52.59/52.82  tff(3979,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 3978])).
% 52.59/52.82  tff(3980,plain,((~(Y!0 = n13)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3981,plain,
% 52.59/52.82      (~(Y!0 = n13)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3980, 2521])).
% 52.59/52.82  tff(3982,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n18)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 160])).
% 52.59/52.82  tff(3983,plain,
% 52.59/52.82      (sum(n17, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3982])).
% 52.59/52.82  tff(3984,plain,
% 52.59/52.82      (n14 = sum(n17, n18)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3678])).
% 52.59/52.82  tff(3985,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n8, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[158, 2523])).
% 52.59/52.82  tff(3986,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.59/52.82      inference(transitivity,[status(thm)],[3985, 1567])).
% 52.59/52.82  tff(3987,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n10)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 155])).
% 52.59/52.82  tff(3988,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.59/52.82      inference(transitivity,[status(thm)],[3987, 1564])).
% 52.59/52.82  tff(3989,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[3988, 3986])).
% 52.59/52.82  tff(3990,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[3989, 405, 3984, 3983])).
% 52.59/52.82  tff(3991,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 3990])).
% 52.59/52.82  tff(3992,plain,((~(Y!0 = n9)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(3993,plain,
% 52.59/52.82      (~(Y!0 = n9)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[3992, 2521])).
% 52.59/52.82  tff(3994,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n10)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 96])).
% 52.59/52.82  tff(3995,plain,
% 52.59/52.82      (sum(n17, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[3994])).
% 52.59/52.82  tff(3996,plain,
% 52.59/52.82      (n6 = sum(n17, n10)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3759])).
% 52.59/52.82  tff(3997,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n4, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[94, 2523])).
% 52.59/52.82  tff(3998,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.59/52.82      inference(transitivity,[status(thm)],[3997, 1508])).
% 52.59/52.82  tff(3999,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n6)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 91])).
% 52.59/52.82  tff(4000,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.59/52.82      inference(transitivity,[status(thm)],[3999, 1505])).
% 52.59/52.82  tff(4001,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[4000, 3998])).
% 52.59/52.82  tff(4002,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[4001, 224, 3996, 3995])).
% 52.59/52.82  tff(4003,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 4002])).
% 52.59/52.82  tff(4004,plain,((~(Y!0 = n5)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(4005,plain,
% 52.59/52.82      (~(Y!0 = n5)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[4004, 2521])).
% 52.59/52.82  tff(4006,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n12)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 34])).
% 52.59/52.82  tff(4007,plain,
% 52.59/52.82      (sum(n17, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[4006])).
% 52.59/52.82  tff(4008,plain,
% 52.59/52.82      (n8 = sum(n17, n12)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3000])).
% 52.59/52.82  tff(4009,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n5, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[32, 2523])).
% 52.59/52.82  tff(4010,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.59/52.82      inference(transitivity,[status(thm)],[4009, 1523])).
% 52.59/52.82  tff(4011,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n7)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 29])).
% 52.59/52.82  tff(4012,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.59/52.82      inference(transitivity,[status(thm)],[4011, 1520])).
% 52.59/52.82  tff(4013,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[4012, 4010])).
% 52.59/52.82  tff(4014,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[4013, 264, 4008, 4007])).
% 52.59/52.82  tff(4015,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 4014])).
% 52.59/52.82  tff(4016,plain,((~(Y!0 = n6)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(4017,plain,
% 52.59/52.82      (~(Y!0 = n6)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[4016, 2521])).
% 52.59/52.82  tff(4018,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n9)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 21])).
% 52.59/52.82  tff(4019,plain,
% 52.59/52.82      (sum(n17, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[4018])).
% 52.59/52.82  tff(4020,plain,
% 52.59/52.82      (n5 = sum(n17, n9)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3879])).
% 52.59/52.82  tff(4021,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n14, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[19, 2523])).
% 52.59/52.82  tff(4022,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.59/52.82      inference(transitivity,[status(thm)],[4021, 1661])).
% 52.59/52.82  tff(4023,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n16)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 16])).
% 52.59/52.82  tff(4024,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.59/52.82      inference(transitivity,[status(thm)],[4023, 1658])).
% 52.59/52.82  tff(4025,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[4024, 4022])).
% 52.59/52.82  tff(4026,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[4025, 51, 4020, 4019])).
% 52.59/52.82  tff(4027,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 4026])).
% 52.59/52.82  tff(4028,plain,((~(Y!0 = n15)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(4029,plain,
% 52.59/52.82      (~(Y!0 = n15)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[4028, 2521])).
% 52.59/52.82  tff(4030,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n7)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 283])).
% 52.59/52.82  tff(4031,plain,
% 52.59/52.82      (sum(n17, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[4030])).
% 52.59/52.82  tff(4032,plain,
% 52.59/52.82      (n3 = sum(n17, n7)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3785])).
% 52.59/52.82  tff(4033,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n13, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[281, 2523])).
% 52.59/52.82  tff(4034,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.59/52.82      inference(transitivity,[status(thm)],[4033, 1647])).
% 52.59/52.82  tff(4035,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n15)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 278])).
% 52.59/52.82  tff(4036,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.59/52.82      inference(transitivity,[status(thm)],[4035, 1644])).
% 52.59/52.82  tff(4037,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[4036, 4034])).
% 52.59/52.82  tff(4038,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[4037, 123, 4032, 4031])).
% 52.59/52.82  tff(4039,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 4038])).
% 52.59/52.82  tff(4040,plain,((~(Y!0 = n14)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(4041,plain,
% 52.59/52.82      (~(Y!0 = n14)),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[4040, 2521])).
% 52.59/52.82  tff(4042,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n14)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2527, 1055])).
% 52.59/52.82  tff(4043,plain,
% 52.59/52.82      (sum(n17, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(symmetry,[status(thm)],[4042])).
% 52.59/52.82  tff(4044,plain,
% 52.59/52.82      (n10 = sum(n17, n14)),
% 52.59/52.82      inference(symmetry,[status(thm)],[3746])).
% 52.59/52.82  tff(4045,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = sum(n6, n20)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[1053, 2523])).
% 52.59/52.82  tff(4046,plain,
% 52.59/52.82      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.59/52.82      inference(transitivity,[status(thm)],[4045, 1438])).
% 52.59/52.82  tff(4047,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = sum(n18, n8)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[2525, 1051])).
% 52.59/52.82  tff(4048,plain,
% 52.59/52.82      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.59/52.82      inference(transitivity,[status(thm)],[4047, 1535])).
% 52.59/52.82  tff(4049,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.59/52.82      inference(monotonicity,[status(thm)],[4048, 4046])).
% 52.59/52.82  tff(4050,plain,
% 52.59/52.82      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.82      inference(transitivity,[status(thm)],[4049, 313, 4044, 4043])).
% 52.59/52.82  tff(4051,plain,
% 52.59/52.82      ($false),
% 52.59/52.82      inference(unit_resolution,[status(thm)],[60, 4050])).
% 52.59/52.82  tff(4052,plain,((~(Y!0 = n7)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.82  tff(4053,plain,
% 52.59/52.83      (~(Y!0 = n7)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4052, 2521])).
% 52.59/52.83  tff(4054,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n11)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2527, 308])).
% 52.59/52.83  tff(4055,plain,
% 52.59/52.83      (sum(n17, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4054])).
% 52.59/52.83  tff(4056,plain,
% 52.59/52.83      (n7 = sum(n17, n11)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3865])).
% 52.59/52.83  tff(4057,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n15, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[306, 2523])).
% 52.59/52.83  tff(4058,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.59/52.83      inference(transitivity,[status(thm)],[4057, 3861])).
% 52.59/52.83  tff(4059,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n18, n17)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2525, 303])).
% 52.59/52.83  tff(4060,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.59/52.83      inference(transitivity,[status(thm)],[4059, 1562])).
% 52.59/52.83  tff(4061,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4060, 4058])).
% 52.59/52.83  tff(4062,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4061, 192, 4056, 4055])).
% 52.59/52.83  tff(4063,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4062])).
% 52.59/52.83  tff(4064,plain,((~(Y!0 = n16)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4065,plain,
% 52.59/52.83      (~(Y!0 = n16)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4064, 2521])).
% 52.59/52.83  tff(4066,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n13)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2527, 1392])).
% 52.59/52.83  tff(4067,plain,
% 52.59/52.83      (sum(n17, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4066])).
% 52.59/52.83  tff(4068,plain,
% 52.59/52.83      (n9 = sum(n17, n13)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3851])).
% 52.59/52.83  tff(4069,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n16, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1390, 2523])).
% 52.59/52.83  tff(4070,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.59/52.83      inference(transitivity,[status(thm)],[4069, 2189])).
% 52.59/52.83  tff(4071,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n18, n18)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2525, 1387])).
% 52.59/52.83  tff(4072,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.59/52.83      inference(transitivity,[status(thm)],[4071, 374])).
% 52.59/52.83  tff(4073,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4072, 4070])).
% 52.59/52.83  tff(4074,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4073, 513, 4068, 4067])).
% 52.59/52.83  tff(4075,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4074])).
% 52.59/52.83  tff(4076,plain,((~(Y!0 = n17)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4077,plain,
% 52.59/52.83      (~(Y!0 = n17)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4076, 2521])).
% 52.59/52.83  tff(4078,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2527, 1435])).
% 52.59/52.83  tff(4079,plain,
% 52.59/52.83      (sum(n17, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4078])).
% 52.59/52.83  tff(4080,plain,
% 52.59/52.83      (n16 = sum(n17, n20)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3899])).
% 52.59/52.83  tff(4081,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n9, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1433, 2523])).
% 52.59/52.83  tff(4082,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.59/52.83      inference(transitivity,[status(thm)],[4081, 1582])).
% 52.59/52.83  tff(4083,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n18, n11)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2525, 1431])).
% 52.59/52.83  tff(4084,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.59/52.83      inference(transitivity,[status(thm)],[4083, 1579])).
% 52.59/52.83  tff(4085,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4084, 4082])).
% 52.59/52.83  tff(4086,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4085, 209, 4080, 4079])).
% 52.59/52.83  tff(4087,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4086])).
% 52.59/52.83  tff(4088,plain,((~(Y!0 = n10)) | (~(X!1 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4089,plain,
% 52.59/52.83      (~(Y!0 = n10)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4088, 2521])).
% 52.59/52.83  tff(4090,plain,
% 52.59/52.83      (Y!0 = n12),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[3667, 4089, 3701, 3909, 4077, 4065, 4053, 4041, 4029, 4017, 4005, 3993, 3981, 3969, 3957, 3945, 3933, 3921])).
% 52.59/52.83  tff(4091,plain,
% 52.59/52.83      (succ(Y!0) = succ(n12)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4090])).
% 52.59/52.83  tff(4092,plain,
% 52.59/52.83      (succ(Y!0) = n13),
% 52.59/52.83      inference(transitivity,[status(thm)],[4091, 98])).
% 52.59/52.83  tff(4093,plain,
% 52.59/52.83      (pred(Y!0) = pred(n12)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4090])).
% 52.59/52.83  tff(4094,plain,
% 52.59/52.83      (pred(Y!0) = n11),
% 52.59/52.83      inference(transitivity,[status(thm)],[4093, 336])).
% 52.59/52.83  tff(4095,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(Y!0)) = sum(n11, n13)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4094, 4092])).
% 52.59/52.83  tff(4096,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(Y!0)) = n3),
% 52.59/52.83      inference(transitivity,[status(thm)],[4095, 97])).
% 52.59/52.83  tff(4097,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n3)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2527, 4096])).
% 52.59/52.83  tff(4098,plain,
% 52.59/52.83      (sum(n17, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4097])).
% 52.59/52.83  tff(4099,plain,
% 52.59/52.83      (n20 = sum(n17, n3)),
% 52.59/52.83      inference(symmetry,[status(thm)],[1881])).
% 52.59/52.83  tff(4100,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n11, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4094, 2523])).
% 52.59/52.83  tff(4101,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.59/52.83      inference(transitivity,[status(thm)],[4100, 1612])).
% 52.59/52.83  tff(4102,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n18, n13)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2525, 4092])).
% 52.59/52.83  tff(4103,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.59/52.83      inference(transitivity,[status(thm)],[4102, 1609])).
% 52.59/52.83  tff(4104,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4103, 4101])).
% 52.59/52.83  tff(4105,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4104, 1358, 4099, 4098])).
% 52.59/52.83  tff(4106,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4105])).
% 52.59/52.83  tff(4107,plain,((~(X!1 = n19)) | (Y!0 = n18) | (Y!0 = n19)), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4108,plain,
% 52.59/52.83      (~(X!1 = n19)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4107, 3909, 3701])).
% 52.59/52.83  tff(4109,plain,
% 52.59/52.83      (X!1 = n20),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[3648, 4108, 3699, 3698, 3908, 3907, 3700, 3697, 3696, 24, 3695, 3694, 3693, 3692, 3691, 3690, 3689, 3688, 3687])).
% 52.59/52.83  tff(4110,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n8)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 1477])).
% 52.59/52.83  tff(4111,plain,
% 52.59/52.83      (sum(n19, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4110])).
% 52.59/52.83  tff(4112,plain,
% 52.59/52.83      (n6 = sum(n19, n8)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3363])).
% 52.59/52.83  tff(4113,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n3, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1475, 2500])).
% 52.59/52.83  tff(4114,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.59/52.83      inference(transitivity,[status(thm)],[4113, 451])).
% 52.59/52.83  tff(4115,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n5)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 1473])).
% 52.59/52.83  tff(4116,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.59/52.83      inference(transitivity,[status(thm)],[4115, 3322])).
% 52.59/52.83  tff(4117,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4116, 4114])).
% 52.59/52.83  tff(4118,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4117, 224, 4112, 4111])).
% 52.59/52.83  tff(4119,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4118])).
% 52.59/52.83  tff(4120,plain,((~(Y!0 = n4)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4121,plain,
% 52.59/52.83      (~(Y!0 = n4)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4120, 4109])).
% 52.59/52.83  tff(4122,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n4)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 797])).
% 52.59/52.83  tff(4123,plain,
% 52.59/52.83      (sum(n19, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4122])).
% 52.59/52.83  tff(4124,plain,
% 52.59/52.83      (n2 = sum(n19, n4)),
% 52.59/52.83      inference(symmetry,[status(thm)],[2513])).
% 52.59/52.83  tff(4125,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n1, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[795, 2500])).
% 52.59/52.83  tff(4126,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.59/52.83      inference(transitivity,[status(thm)],[4125, 436])).
% 52.59/52.83  tff(4127,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n3)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 792])).
% 52.59/52.83  tff(4128,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.59/52.83      inference(transitivity,[status(thm)],[4127, 3296])).
% 52.59/52.83  tff(4129,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4128, 4126])).
% 52.59/52.83  tff(4130,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4129, 599, 4124, 4123])).
% 52.59/52.83  tff(4131,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4130])).
% 52.59/52.83  tff(4132,plain,((~(Y!0 = n2)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4133,plain,
% 52.59/52.83      (~(Y!0 = n2)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4132, 4109])).
% 52.59/52.83  tff(4134,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n2)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 635])).
% 52.59/52.83  tff(4135,plain,
% 52.59/52.83      (sum(n19, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4134])).
% 52.59/52.83  tff(4136,plain,
% 52.59/52.83      (n0 = sum(n19, n2)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3560])).
% 52.59/52.83  tff(4137,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n0, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[633, 2500])).
% 52.59/52.83  tff(4138,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.59/52.83      inference(transitivity,[status(thm)],[4137, 75])).
% 52.59/52.83  tff(4139,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n2)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 630])).
% 52.59/52.83  tff(4140,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.59/52.83      inference(transitivity,[status(thm)],[4139, 3560])).
% 52.59/52.83  tff(4141,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4140, 4138])).
% 52.59/52.83  tff(4142,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4141, 75, 4136, 4135])).
% 52.59/52.83  tff(4143,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4142])).
% 52.59/52.83  tff(4144,plain,((~(Y!0 = n1)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4145,plain,
% 52.59/52.83      (~(Y!0 = n1)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4144, 4109])).
% 52.59/52.83  tff(4146,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 425])).
% 52.59/52.83  tff(4147,plain,
% 52.59/52.83      (sum(n19, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4146])).
% 52.59/52.83  tff(4148,plain,
% 52.59/52.83      (n19 = sum(n19, n0)),
% 52.59/52.83      inference(symmetry,[status(thm)],[2496])).
% 52.59/52.83  tff(4149,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n20, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[423, 2500])).
% 52.59/52.83  tff(4150,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.59/52.83      inference(transitivity,[status(thm)],[4149, 3583])).
% 52.59/52.83  tff(4151,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n1)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 420])).
% 52.59/52.83  tff(4152,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.59/52.83      inference(transitivity,[status(thm)],[4151, 3010])).
% 52.59/52.83  tff(4153,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4152, 4150])).
% 52.59/52.83  tff(4154,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4153, 139, 4148, 4147])).
% 52.59/52.83  tff(4155,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4154])).
% 52.59/52.83  tff(4156,plain,((~(Y!0 = n0)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4157,plain,
% 52.59/52.83      (~(Y!0 = n0)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4156, 4109])).
% 52.59/52.83  tff(4158,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n5)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 332])).
% 52.59/52.83  tff(4159,plain,
% 52.59/52.83      (sum(n19, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4158])).
% 52.59/52.83  tff(4160,plain,
% 52.59/52.83      (n3 = sum(n19, n5)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3322])).
% 52.59/52.83  tff(4161,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n12, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[330, 2500])).
% 52.59/52.83  tff(4162,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.59/52.83      inference(transitivity,[status(thm)],[4161, 940])).
% 52.59/52.83  tff(4163,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n14)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 327])).
% 52.59/52.83  tff(4164,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.59/52.83      inference(transitivity,[status(thm)],[4163, 3446])).
% 52.59/52.83  tff(4165,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4164, 4162])).
% 52.59/52.83  tff(4166,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4165, 123, 4160, 4159])).
% 52.59/52.83  tff(4167,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4166])).
% 52.59/52.83  tff(4168,plain,((~(Y!0 = n13)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4169,plain,
% 52.59/52.83      (~(Y!0 = n13)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4168, 4109])).
% 52.59/52.83  tff(4170,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n18)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 160])).
% 52.59/52.83  tff(4171,plain,
% 52.59/52.83      (sum(n19, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4170])).
% 52.59/52.83  tff(4172,plain,
% 52.59/52.83      (n16 = sum(n19, n18)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3488])).
% 52.59/52.83  tff(4173,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n8, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[158, 2500])).
% 52.59/52.83  tff(4174,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.59/52.83      inference(transitivity,[status(thm)],[4173, 466])).
% 52.59/52.83  tff(4175,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n10)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 155])).
% 52.59/52.83  tff(4176,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.59/52.83      inference(transitivity,[status(thm)],[4175, 3392])).
% 52.59/52.83  tff(4177,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4176, 4174])).
% 52.59/52.83  tff(4178,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4177, 209, 4172, 4171])).
% 52.59/52.83  tff(4179,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4178])).
% 52.59/52.83  tff(4180,plain,((~(Y!0 = n9)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4181,plain,
% 52.59/52.83      (~(Y!0 = n9)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4180, 4109])).
% 52.59/52.83  tff(4182,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n10)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 96])).
% 52.59/52.83  tff(4183,plain,
% 52.59/52.83      (sum(n19, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4182])).
% 52.59/52.83  tff(4184,plain,
% 52.59/52.83      (n8 = sum(n19, n10)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3392])).
% 52.59/52.83  tff(4185,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n4, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[94, 2500])).
% 52.59/52.83  tff(4186,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.59/52.83      inference(transitivity,[status(thm)],[4185, 1706])).
% 52.59/52.83  tff(4187,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n6)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 91])).
% 52.59/52.83  tff(4188,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.59/52.83      inference(transitivity,[status(thm)],[4187, 2508])).
% 52.59/52.83  tff(4189,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4188, 4186])).
% 52.59/52.83  tff(4190,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4189, 264, 4184, 4183])).
% 52.59/52.83  tff(4191,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4190])).
% 52.59/52.83  tff(4192,plain,((~(Y!0 = n5)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4193,plain,
% 52.59/52.83      (~(Y!0 = n5)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4192, 4109])).
% 52.59/52.83  tff(4194,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n12)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 34])).
% 52.59/52.83  tff(4195,plain,
% 52.59/52.83      (sum(n19, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4194])).
% 52.59/52.83  tff(4196,plain,
% 52.59/52.83      (n10 = sum(n19, n12)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3014])).
% 52.59/52.83  tff(4197,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n5, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[32, 2500])).
% 52.59/52.83  tff(4198,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.59/52.83      inference(transitivity,[status(thm)],[4197, 3351])).
% 52.59/52.83  tff(4199,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n7)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 29])).
% 52.59/52.83  tff(4200,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.59/52.83      inference(transitivity,[status(thm)],[4199, 3348])).
% 52.59/52.83  tff(4201,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4200, 4198])).
% 52.59/52.83  tff(4202,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4201, 313, 4196, 4195])).
% 52.59/52.83  tff(4203,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4202])).
% 52.59/52.83  tff(4204,plain,((~(Y!0 = n6)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4205,plain,
% 52.59/52.83      (~(Y!0 = n6)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4204, 4109])).
% 52.59/52.83  tff(4206,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n9)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 21])).
% 52.59/52.83  tff(4207,plain,
% 52.59/52.83      (sum(n19, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4206])).
% 52.59/52.83  tff(4208,plain,
% 52.59/52.83      (n7 = sum(n19, n9)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3377])).
% 52.59/52.83  tff(4209,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n14, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[19, 2500])).
% 52.59/52.83  tff(4210,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.59/52.83      inference(transitivity,[status(thm)],[4209, 496])).
% 52.59/52.83  tff(4211,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n16)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 16])).
% 52.59/52.83  tff(4212,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.59/52.83      inference(transitivity,[status(thm)],[4211, 3474])).
% 52.59/52.83  tff(4213,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4212, 4210])).
% 52.59/52.83  tff(4214,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4213, 192, 4208, 4207])).
% 52.59/52.83  tff(4215,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4214])).
% 52.59/52.83  tff(4216,plain,((~(Y!0 = n15)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4217,plain,
% 52.59/52.83      (~(Y!0 = n15)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4216, 4109])).
% 52.59/52.83  tff(4218,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n7)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 283])).
% 52.59/52.83  tff(4219,plain,
% 52.59/52.83      (sum(n19, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4218])).
% 52.59/52.83  tff(4220,plain,
% 52.59/52.83      (n5 = sum(n19, n7)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3348])).
% 52.59/52.83  tff(4221,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n13, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[281, 2500])).
% 52.59/52.83  tff(4222,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.59/52.83      inference(transitivity,[status(thm)],[4221, 2104])).
% 52.59/52.83  tff(4223,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n15)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 278])).
% 52.59/52.83  tff(4224,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.59/52.83      inference(transitivity,[status(thm)],[4223, 3460])).
% 52.59/52.83  tff(4225,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4224, 4222])).
% 52.59/52.83  tff(4226,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4225, 51, 4220, 4219])).
% 52.59/52.83  tff(4227,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4226])).
% 52.59/52.83  tff(4228,plain,((~(Y!0 = n14)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4229,plain,
% 52.59/52.83      (~(Y!0 = n14)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4228, 4109])).
% 52.59/52.83  tff(4230,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n14)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 1055])).
% 52.59/52.83  tff(4231,plain,
% 52.59/52.83      (sum(n19, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4230])).
% 52.59/52.83  tff(4232,plain,
% 52.59/52.83      (n12 = sum(n19, n14)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3446])).
% 52.59/52.83  tff(4233,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n6, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1053, 2500])).
% 52.59/52.83  tff(4234,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.59/52.83      inference(transitivity,[status(thm)],[4233, 1259])).
% 52.59/52.83  tff(4235,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n8)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 1051])).
% 52.59/52.83  tff(4236,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.59/52.83      inference(transitivity,[status(thm)],[4235, 3363])).
% 52.59/52.83  tff(4237,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4236, 4234])).
% 52.59/52.83  tff(4238,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4237, 127, 4232, 4231])).
% 52.59/52.83  tff(4239,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4238])).
% 52.59/52.83  tff(4240,plain,((~(Y!0 = n7)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4241,plain,
% 52.59/52.83      (~(Y!0 = n7)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4240, 4109])).
% 52.59/52.83  tff(4242,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n11)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 308])).
% 52.59/52.83  tff(4243,plain,
% 52.59/52.83      (sum(n19, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4242])).
% 52.59/52.83  tff(4244,plain,
% 52.59/52.83      (n9 = sum(n19, n11)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3405])).
% 52.59/52.83  tff(4245,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n15, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[306, 2500])).
% 52.59/52.83  tff(4246,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.59/52.83      inference(transitivity,[status(thm)],[4245, 3506])).
% 52.59/52.83  tff(4247,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n17)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 303])).
% 52.59/52.83  tff(4248,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.59/52.83      inference(transitivity,[status(thm)],[4247, 3503])).
% 52.59/52.83  tff(4249,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4248, 4246])).
% 52.59/52.83  tff(4250,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4249, 513, 4244, 4243])).
% 52.59/52.83  tff(4251,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4250])).
% 52.59/52.83  tff(4252,plain,((~(Y!0 = n16)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4253,plain,
% 52.59/52.83      (~(Y!0 = n16)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4252, 4109])).
% 52.59/52.83  tff(4254,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n13)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 1392])).
% 52.59/52.83  tff(4255,plain,
% 52.59/52.83      (sum(n19, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4254])).
% 52.59/52.83  tff(4256,plain,
% 52.59/52.83      (n11 = sum(n19, n13)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3431])).
% 52.59/52.83  tff(4257,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n16, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1390, 2500])).
% 52.59/52.83  tff(4258,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.59/52.83      inference(transitivity,[status(thm)],[4257, 3491])).
% 52.59/52.83  tff(4259,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n18)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 1387])).
% 52.59/52.83  tff(4260,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.59/52.83      inference(transitivity,[status(thm)],[4259, 3488])).
% 52.59/52.83  tff(4261,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4260, 4258])).
% 52.59/52.83  tff(4262,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4261, 208, 4256, 4255])).
% 52.59/52.83  tff(4263,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4262])).
% 52.59/52.83  tff(4264,plain,((~(Y!0 = n17)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4265,plain,
% 52.59/52.83      (~(Y!0 = n17)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4264, 4109])).
% 52.59/52.83  tff(4266,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n3)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 1413])).
% 52.59/52.83  tff(4267,plain,
% 52.59/52.83      (sum(n19, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4266])).
% 52.59/52.83  tff(4268,plain,
% 52.59/52.83      (n1 = sum(n19, n3)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3296])).
% 52.59/52.83  tff(4269,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n11, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1411, 2500])).
% 52.59/52.83  tff(4270,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.59/52.83      inference(transitivity,[status(thm)],[4269, 3434])).
% 52.59/52.83  tff(4271,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n13)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 1409])).
% 52.59/52.83  tff(4272,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.59/52.83      inference(transitivity,[status(thm)],[4271, 3431])).
% 52.59/52.83  tff(4273,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4272, 4270])).
% 52.59/52.83  tff(4274,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4273, 438, 4268, 4267])).
% 52.59/52.83  tff(4275,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4274])).
% 52.59/52.83  tff(4276,plain,((~(Y!0 = n12)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4277,plain,
% 52.59/52.83      (~(Y!0 = n12)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4276, 4109])).
% 52.59/52.83  tff(4278,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n16)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2505, 1898])).
% 52.59/52.83  tff(4279,plain,
% 52.59/52.83      (sum(n19, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4278])).
% 52.59/52.83  tff(4280,plain,
% 52.59/52.83      (n14 = sum(n19, n16)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3474])).
% 52.59/52.83  tff(4281,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n7, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[1896, 2500])).
% 52.59/52.83  tff(4282,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.59/52.83      inference(transitivity,[status(thm)],[4281, 3380])).
% 52.59/52.83  tff(4283,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n9)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[2503, 1894])).
% 52.59/52.83  tff(4284,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.59/52.83      inference(transitivity,[status(thm)],[4283, 3377])).
% 52.59/52.83  tff(4285,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4284, 4282])).
% 52.59/52.83  tff(4286,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4285, 405, 4280, 4279])).
% 52.59/52.83  tff(4287,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4286])).
% 52.59/52.83  tff(4288,plain,((~(Y!0 = n8)) | (~(X!1 = n20))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4289,plain,
% 52.59/52.83      (~(Y!0 = n8)),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4288, 4109])).
% 52.59/52.83  tff(4290,plain,
% 52.59/52.83      (Y!0 = n10),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[3667, 4289, 3701, 3909, 4277, 4265, 4253, 4241, 4229, 4217, 4205, 4193, 4181, 4169, 4157, 4145, 4133, 4121])).
% 52.59/52.83  tff(4291,plain,
% 52.59/52.83      (succ(Y!0) = succ(n10)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4290])).
% 52.59/52.83  tff(4292,plain,
% 52.59/52.83      (succ(Y!0) = n11),
% 52.59/52.83      inference(transitivity,[status(thm)],[4291, 237])).
% 52.59/52.83  tff(4293,plain,
% 52.59/52.83      (pred(Y!0) = pred(n10)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4290])).
% 52.59/52.83  tff(4294,plain,
% 52.59/52.83      (pred(Y!0) = n9),
% 52.59/52.83      inference(transitivity,[status(thm)],[4293, 240])).
% 52.59/52.83  tff(4295,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(Y!0)) = sum(n9, n11)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4294, 4292])).
% 52.59/52.83  tff(4296,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(Y!0)) = n20),
% 52.59/52.83      inference(transitivity,[status(thm)],[4295, 236])).
% 52.59/52.83  tff(4297,plain,
% 52.59/52.83      (succ(X!1) = succ(n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4109])).
% 52.59/52.83  tff(4298,plain,
% 52.59/52.83      (succ(X!1) = n0),
% 52.59/52.83      inference(transitivity,[status(thm)],[4297, 2497])).
% 52.59/52.83  tff(4299,plain,
% 52.59/52.83      (pred(X!1) = pred(n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4109])).
% 52.59/52.83  tff(4300,plain,
% 52.59/52.83      (pred(X!1) = n19),
% 52.59/52.83      inference(transitivity,[status(thm)],[4299, 2501])).
% 52.59/52.83  tff(4301,plain,
% 52.59/52.83      (sum(pred(X!1), succ(X!1)) = sum(n19, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4300, 4298])).
% 52.59/52.83  tff(4302,plain,
% 52.59/52.83      (sum(pred(X!1), succ(X!1)) = n19),
% 52.59/52.83      inference(transitivity,[status(thm)],[4301, 2496])).
% 52.59/52.83  tff(4303,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n20)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4302, 4296])).
% 52.59/52.83  tff(4304,plain,
% 52.59/52.83      (sum(n19, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(symmetry,[status(thm)],[4303])).
% 52.59/52.83  tff(4305,plain,
% 52.59/52.83      (n18 = sum(n19, n20)),
% 52.59/52.83      inference(symmetry,[status(thm)],[3546])).
% 52.59/52.83  tff(4306,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = sum(n9, n0)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4294, 4298])).
% 52.59/52.83  tff(4307,plain,
% 52.59/52.83      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.59/52.83      inference(transitivity,[status(thm)],[4306, 511])).
% 52.59/52.83  tff(4308,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = sum(n19, n11)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4300, 4292])).
% 52.59/52.83  tff(4309,plain,
% 52.59/52.83      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.59/52.83      inference(transitivity,[status(thm)],[4308, 3405])).
% 52.59/52.83  tff(4310,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4309, 4307])).
% 52.59/52.83  tff(4311,plain,
% 52.59/52.83      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.83      inference(transitivity,[status(thm)],[4310, 1315, 4305, 4304])).
% 52.59/52.83  tff(4312,plain,
% 52.59/52.83      ($false),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[60, 4311])).
% 52.59/52.83  tff(4313,plain,((Y!0 = n19) | (Y!0 = n18) | (X!1 = n2) | (X!1 = n3) | (X!1 = n18) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)), inference(lemma,lemma(discharge,[]))).
% 52.59/52.83  tff(4314,plain,
% 52.59/52.83      (Y!0 = n19),
% 52.59/52.83      inference(unit_resolution,[status(thm)],[4313, 3908, 3699, 3698, 3701, 3907, 3700, 3697, 3696, 24, 3695, 3694, 3693, 3692, 3691, 3690, 3689, 3688, 3687])).
% 52.59/52.83  tff(4315,plain,
% 52.59/52.83      (succ(Y!0) = succ(n19)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4314])).
% 52.59/52.83  tff(4316,plain,
% 52.59/52.83      (succ(Y!0) = n20),
% 52.59/52.83      inference(transitivity,[status(thm)],[4315, 1492])).
% 52.59/52.83  tff(4317,plain,
% 52.59/52.83      (pred(Y!0) = pred(n19)),
% 52.59/52.83      inference(monotonicity,[status(thm)],[4314])).
% 52.59/52.84  tff(4318,plain,
% 52.59/52.84      (pred(Y!0) = n18),
% 52.59/52.84      inference(transitivity,[status(thm)],[4317, 1496])).
% 52.59/52.84  tff(4319,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(Y!0)) = sum(n18, n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4318, 4316])).
% 52.59/52.84  tff(4320,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(Y!0)) = n17),
% 52.59/52.84      inference(transitivity,[status(thm)],[4319, 1491])).
% 52.59/52.84  tff(4321,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n18, n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[1498, 2523])).
% 52.59/52.84  tff(4322,plain,
% 52.59/52.84      (pred(n19) = pred(Y!0)),
% 52.59/52.84      inference(symmetry,[status(thm)],[1497])).
% 52.59/52.84  tff(4323,plain,
% 52.59/52.84      (pred(X!1) = pred(Y!0)),
% 52.59/52.84      inference(transitivity,[status(thm)],[2524, 4322])).
% 52.59/52.84  tff(4324,plain,
% 52.59/52.84      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4323])).
% 52.59/52.84  tff(4325,plain,
% 52.59/52.84      (sum(pred(X!1), succ(X!1)) = n17),
% 52.59/52.84      inference(transitivity,[status(thm)],[4324, 4321, 1491])).
% 52.59/52.84  tff(4326,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4325, 1500])).
% 52.59/52.84  tff(4327,plain,
% 52.59/52.84      (sum(n17, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4326])).
% 52.59/52.84  tff(4328,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.59/52.84      inference(transitivity,[status(thm)],[4321, 1491])).
% 52.59/52.84  tff(4329,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n18, n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[2525, 1495])).
% 52.59/52.84  tff(4330,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.59/52.84      inference(transitivity,[status(thm)],[4329, 1491])).
% 52.59/52.84  tff(4331,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4330, 4328])).
% 52.59/52.84  tff(4332,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4331, 4327])).
% 52.59/52.84  tff(4333,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4332])).
% 52.59/52.84  tff(4334,plain,((~(X!1 = n19)) | (~(Y!0 = n19))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4335,plain,
% 52.59/52.84      (~(X!1 = n19)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4334, 4314])).
% 52.59/52.84  tff(4336,plain,
% 52.59/52.84      (X!1 = n20),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[3648, 4335, 3699, 3698, 3908, 3907, 3700, 3697, 3696, 24, 3695, 3694, 3693, 3692, 3691, 3690, 3689, 3688, 3687])).
% 52.59/52.84  tff(4337,plain,
% 52.59/52.84      (succ(X!1) = succ(n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4336])).
% 52.59/52.84  tff(4338,plain,
% 52.59/52.84      (succ(X!1) = n0),
% 52.59/52.84      inference(transitivity,[status(thm)],[4337, 2497])).
% 52.59/52.84  tff(4339,plain,
% 52.59/52.84      (pred(X!1) = pred(n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4336])).
% 52.59/52.84  tff(4340,plain,
% 52.59/52.84      (pred(X!1) = n19),
% 52.59/52.84      inference(transitivity,[status(thm)],[4339, 2501])).
% 52.59/52.84  tff(4341,plain,
% 52.59/52.84      (sum(pred(X!1), succ(X!1)) = sum(n19, n0)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4340, 4338])).
% 52.59/52.84  tff(4342,plain,
% 52.59/52.84      (sum(pred(X!1), succ(X!1)) = n19),
% 52.59/52.84      inference(transitivity,[status(thm)],[4341, 2496])).
% 52.59/52.84  tff(4343,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4342, 4320])).
% 52.59/52.84  tff(4344,plain,
% 52.59/52.84      (sum(n19, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4343])).
% 52.59/52.84  tff(4345,plain,
% 52.59/52.84      (n15 = sum(n19, n17)),
% 52.59/52.84      inference(symmetry,[status(thm)],[3503])).
% 52.59/52.84  tff(4346,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n18, n0)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4318, 4338])).
% 52.59/52.84  tff(4347,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.59/52.84      inference(transitivity,[status(thm)],[4346, 3549])).
% 52.59/52.84  tff(4348,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n19, n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4340, 4316])).
% 52.59/52.84  tff(4349,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.59/52.84      inference(transitivity,[status(thm)],[4348, 3546])).
% 52.59/52.84  tff(4350,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4349, 4347])).
% 52.59/52.84  tff(4351,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4350, 374, 4345, 4344])).
% 52.59/52.84  tff(4352,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4351])).
% 52.59/52.84  tff(4353,plain,((X!1 = n18) | (X!1 = n2) | (X!1 = n3) | (X!1 = n16) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (Y!0 = n18)), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4354,plain,
% 52.59/52.84      (X!1 = n16),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4353, 3906, 3698, 3699, 3700, 3697, 3696, 24, 3695, 3694, 3693, 3692, 3691, 3690, 3689, 3688, 3687, 3701])).
% 52.59/52.84  tff(4355,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n4)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 797])).
% 52.59/52.84  tff(4356,plain,
% 52.59/52.84      (sum(n11, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4355])).
% 52.59/52.84  tff(4357,plain,
% 52.59/52.84      (n15 = sum(n11, n4)),
% 52.59/52.84      inference(symmetry,[status(thm)],[1418])).
% 52.59/52.84  tff(4358,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n1, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[795, 638])).
% 52.59/52.84  tff(4359,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.59/52.84      inference(transitivity,[status(thm)],[4358, 1592])).
% 52.59/52.84  tff(4360,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n3)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 792])).
% 52.59/52.84  tff(4361,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.59/52.84      inference(transitivity,[status(thm)],[4360, 1828])).
% 52.59/52.84  tff(4362,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4361, 4359])).
% 52.59/52.84  tff(4363,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4362, 374, 4357, 4356])).
% 52.59/52.84  tff(4364,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4363])).
% 52.59/52.84  tff(4365,plain,((~(Y!0 = n2)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4366,plain,
% 52.59/52.84      (~(Y!0 = n2)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4365, 4354])).
% 52.59/52.84  tff(4367,plain,
% 52.59/52.84      (~(Y!0 = n1)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[656, 4354])).
% 52.59/52.84  tff(4368,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n0)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 425])).
% 52.59/52.84  tff(4369,plain,
% 52.59/52.84      (sum(n11, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4368])).
% 52.59/52.84  tff(4370,plain,
% 52.59/52.84      (n11 = sum(n11, n0)),
% 52.59/52.84      inference(symmetry,[status(thm)],[3434])).
% 52.59/52.84  tff(4371,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n20, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[423, 638])).
% 52.59/52.84  tff(4372,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.59/52.84      inference(transitivity,[status(thm)],[4371, 1577])).
% 52.59/52.84  tff(4373,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n1)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 420])).
% 52.59/52.84  tff(4374,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.59/52.84      inference(transitivity,[status(thm)],[4373, 2995])).
% 52.59/52.84  tff(4375,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4374, 4372])).
% 52.59/52.84  tff(4376,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4375, 208, 4370, 4369])).
% 52.59/52.84  tff(4377,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4376])).
% 52.59/52.84  tff(4378,plain,((~(Y!0 = n0)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4379,plain,
% 52.59/52.84      (~(Y!0 = n0)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4378, 4354])).
% 52.59/52.84  tff(4380,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n5)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 332])).
% 52.59/52.84  tff(4381,plain,
% 52.59/52.84      (sum(n11, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4380])).
% 52.59/52.84  tff(4382,plain,
% 52.59/52.84      (sum(n11, n5) = n16),
% 52.59/52.84      inference(and_elim,[status(thm)],[9])).
% 52.59/52.84  tff(4383,plain,
% 52.59/52.84      (n16 = sum(n11, n5)),
% 52.59/52.84      inference(symmetry,[status(thm)],[4382])).
% 52.59/52.84  tff(4384,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n12, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[330, 638])).
% 52.59/52.84  tff(4385,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.59/52.84      inference(transitivity,[status(thm)],[4384, 1518])).
% 52.59/52.84  tff(4386,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n14)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 327])).
% 52.59/52.84  tff(4387,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.59/52.84      inference(transitivity,[status(thm)],[4386, 1207])).
% 52.59/52.84  tff(4388,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4387, 4385])).
% 52.59/52.84  tff(4389,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4388, 209, 4383, 4381])).
% 52.59/52.84  tff(4390,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4389])).
% 52.59/52.84  tff(4391,plain,((~(Y!0 = n13)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4392,plain,
% 52.59/52.84      (~(Y!0 = n13)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4391, 4354])).
% 52.59/52.84  tff(4393,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n18)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 160])).
% 52.59/52.84  tff(4394,plain,
% 52.59/52.84      (sum(n11, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4393])).
% 52.59/52.84  tff(4395,plain,
% 52.59/52.84      (n8 = sum(n11, n18)),
% 52.59/52.84      inference(symmetry,[status(thm)],[2251])).
% 52.59/52.84  tff(4396,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n8, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[158, 638])).
% 52.59/52.84  tff(4397,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.59/52.84      inference(transitivity,[status(thm)],[4396, 1671])).
% 52.59/52.84  tff(4398,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n10)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 155])).
% 52.59/52.84  tff(4399,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.59/52.84      inference(transitivity,[status(thm)],[4398, 3769])).
% 52.59/52.84  tff(4400,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4399, 4397])).
% 52.59/52.84  tff(4401,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4400, 264, 4395, 4394])).
% 52.59/52.84  tff(4402,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4401])).
% 52.59/52.84  tff(4403,plain,((~(Y!0 = n9)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4404,plain,
% 52.59/52.84      (~(Y!0 = n9)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4403, 4354])).
% 52.59/52.84  tff(4405,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n10)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 96])).
% 52.59/52.84  tff(4406,plain,
% 52.59/52.84      (sum(n11, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4405])).
% 52.59/52.84  tff(4407,plain,
% 52.59/52.84      (sum(n11, n10) = n0),
% 52.59/52.84      inference(and_elim,[status(thm)],[9])).
% 52.59/52.84  tff(4408,plain,
% 52.59/52.84      (n0 = sum(n11, n10)),
% 52.59/52.84      inference(symmetry,[status(thm)],[4407])).
% 52.59/52.84  tff(4409,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n4, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[94, 638])).
% 52.59/52.84  tff(4410,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.59/52.84      inference(transitivity,[status(thm)],[4409, 1798])).
% 52.59/52.84  tff(4411,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n6)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 91])).
% 52.59/52.84  tff(4412,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.59/52.84      inference(transitivity,[status(thm)],[4411, 2485])).
% 52.59/52.84  tff(4413,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4412, 4410])).
% 52.59/52.84  tff(4414,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4413, 75, 4408, 4406])).
% 52.59/52.84  tff(4415,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4414])).
% 52.59/52.84  tff(4416,plain,((~(Y!0 = n5)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4417,plain,
% 52.59/52.84      (~(Y!0 = n5)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4416, 4354])).
% 52.59/52.84  tff(4418,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n12)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 34])).
% 52.59/52.84  tff(4419,plain,
% 52.59/52.84      (sum(n11, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4418])).
% 52.59/52.84  tff(4420,plain,
% 52.59/52.84      (n2 = sum(n11, n12)),
% 52.59/52.84      inference(symmetry,[status(thm)],[2920])).
% 52.59/52.84  tff(4421,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n5, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[32, 638])).
% 52.59/52.84  tff(4422,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.59/52.84      inference(transitivity,[status(thm)],[4421, 1629])).
% 52.59/52.84  tff(4423,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n7)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 29])).
% 52.59/52.84  tff(4424,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.59/52.84      inference(transitivity,[status(thm)],[4423, 3808])).
% 52.59/52.84  tff(4425,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4424, 4422])).
% 52.59/52.84  tff(4426,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4425, 599, 4420, 4419])).
% 52.59/52.84  tff(4427,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4426])).
% 52.59/52.84  tff(4428,plain,((~(Y!0 = n6)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4429,plain,
% 52.59/52.84      (~(Y!0 = n6)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4428, 4354])).
% 52.59/52.84  tff(4430,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n9)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 21])).
% 52.59/52.84  tff(4431,plain,
% 52.59/52.84      (sum(n11, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4430])).
% 52.59/52.84  tff(4432,plain,
% 52.59/52.84      (n20 = sum(n11, n9)),
% 52.59/52.84      inference(symmetry,[status(thm)],[2011])).
% 52.59/52.84  tff(4433,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n14, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[19, 638])).
% 52.59/52.84  tff(4434,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.59/52.84      inference(transitivity,[status(thm)],[4433, 1533])).
% 52.59/52.84  tff(4435,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n16)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 16])).
% 52.59/52.84  tff(4436,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.59/52.84      inference(transitivity,[status(thm)],[4435, 3875])).
% 52.59/52.84  tff(4437,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4436, 4434])).
% 52.59/52.84  tff(4438,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4437, 1358, 4432, 4431])).
% 52.59/52.84  tff(4439,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4438])).
% 52.59/52.84  tff(4440,plain,((~(Y!0 = n15)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4441,plain,
% 52.59/52.84      (~(Y!0 = n15)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4440, 4354])).
% 52.59/52.84  tff(4442,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 1500])).
% 52.59/52.84  tff(4443,plain,
% 52.59/52.84      (sum(n11, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4442])).
% 52.59/52.84  tff(4444,plain,
% 52.59/52.84      (sum(n11, n17) = n7),
% 52.59/52.84      inference(and_elim,[status(thm)],[9])).
% 52.59/52.84  tff(4445,plain,
% 52.59/52.84      (n7 = sum(n11, n17)),
% 52.59/52.84      inference(symmetry,[status(thm)],[4444])).
% 52.59/52.84  tff(4446,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n18, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[1498, 638])).
% 52.59/52.84  tff(4447,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.59/52.84      inference(transitivity,[status(thm)],[4446, 1562])).
% 52.59/52.84  tff(4448,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n20)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 1495])).
% 52.59/52.84  tff(4449,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.59/52.84      inference(transitivity,[status(thm)],[4448, 3861])).
% 52.59/52.84  tff(4450,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4449, 4447])).
% 52.59/52.84  tff(4451,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4450, 192, 4445, 4443])).
% 52.59/52.84  tff(4452,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4451])).
% 52.59/52.84  tff(4453,plain,((~(Y!0 = n19)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4454,plain,
% 52.59/52.84      (~(Y!0 = n19)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4453, 4354])).
% 52.59/52.84  tff(4455,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n7)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 283])).
% 52.59/52.84  tff(4456,plain,
% 52.59/52.84      (sum(n11, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4455])).
% 52.59/52.84  tff(4457,plain,
% 52.59/52.84      (sum(n11, n7) = n18),
% 52.59/52.84      inference(and_elim,[status(thm)],[9])).
% 52.59/52.84  tff(4458,plain,
% 52.59/52.84      (n18 = sum(n11, n7)),
% 52.59/52.84      inference(symmetry,[status(thm)],[4457])).
% 52.59/52.84  tff(4459,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n13, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[281, 638])).
% 52.59/52.84  tff(4460,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.59/52.84      inference(transitivity,[status(thm)],[4459, 2185])).
% 52.59/52.84  tff(4461,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n15)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 278])).
% 52.59/52.84  tff(4462,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.59/52.84      inference(transitivity,[status(thm)],[4461, 513])).
% 52.59/52.84  tff(4463,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4462, 4460])).
% 52.59/52.84  tff(4464,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(transitivity,[status(thm)],[4463, 1315, 4458, 4456])).
% 52.59/52.84  tff(4465,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4464])).
% 52.59/52.84  tff(4466,plain,((~(Y!0 = n14)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4467,plain,
% 52.59/52.84      (~(Y!0 = n14)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4466, 4354])).
% 52.59/52.84  tff(4468,plain,
% 52.59/52.84      (~(Y!0 = n7)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[1170, 4354])).
% 52.59/52.84  tff(4469,plain,
% 52.59/52.84      (succ(n16) = succ(X!1)),
% 52.59/52.84      inference(symmetry,[status(thm)],[637])).
% 52.59/52.84  tff(4470,plain,
% 52.59/52.84      (succ(Y!0) = succ(X!1)),
% 52.59/52.84      inference(transitivity,[status(thm)],[302, 4469])).
% 52.59/52.84  tff(4471,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4470])).
% 52.59/52.84  tff(4472,plain,
% 52.59/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[640, 303])).
% 52.59/52.84  tff(4473,plain,
% 52.59/52.84      (sum(n15, n17) = sum(pred(X!1), succ(Y!0))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4472])).
% 52.59/52.84  tff(4474,plain,
% 52.59/52.84      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.59/52.84      inference(transitivity,[status(thm)],[641, 4473])).
% 52.59/52.84  tff(4475,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.59/52.84      inference(monotonicity,[status(thm)],[4474, 4471])).
% 52.59/52.84  tff(4476,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4475])).
% 52.59/52.84  tff(4477,plain,
% 52.59/52.84      ($false),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[60, 4476])).
% 52.59/52.84  tff(4478,plain,((~(Y!0 = n16)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.59/52.84  tff(4479,plain,
% 52.59/52.84      (~(Y!0 = n16)),
% 52.59/52.84      inference(unit_resolution,[status(thm)],[4478, 4354])).
% 52.59/52.84  tff(4480,plain,
% 52.59/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n13)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[642, 1392])).
% 52.59/52.84  tff(4481,plain,
% 52.59/52.84      (sum(n11, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.59/52.84      inference(symmetry,[status(thm)],[4480])).
% 52.59/52.84  tff(4482,plain,
% 52.59/52.84      (n3 = sum(n11, n13)),
% 52.59/52.84      inference(symmetry,[status(thm)],[97])).
% 52.59/52.84  tff(4483,plain,
% 52.59/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n16, n17)),
% 52.59/52.84      inference(monotonicity,[status(thm)],[1390, 638])).
% 52.59/52.84  tff(4484,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.61/52.84      inference(transitivity,[status(thm)],[4483, 1547])).
% 52.61/52.84  tff(4485,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n18)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[640, 1387])).
% 52.61/52.84  tff(4486,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.61/52.84      inference(transitivity,[status(thm)],[4485, 2227])).
% 52.61/52.84  tff(4487,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4486, 4484])).
% 52.61/52.84  tff(4488,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4487, 123, 4482, 4481])).
% 52.61/52.84  tff(4489,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4488])).
% 52.61/52.84  tff(4490,plain,((~(Y!0 = n17)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4491,plain,
% 52.61/52.84      (~(Y!0 = n17)),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4490, 4354])).
% 52.61/52.84  tff(4492,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n3)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[642, 1413])).
% 52.61/52.84  tff(4493,plain,
% 52.61/52.84      (sum(n11, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(symmetry,[status(thm)],[4492])).
% 52.61/52.84  tff(4494,plain,
% 52.61/52.84      (n14 = sum(n11, n3)),
% 52.61/52.84      inference(symmetry,[status(thm)],[857])).
% 52.61/52.84  tff(4495,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n11, n17)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[1411, 638])).
% 52.61/52.84  tff(4496,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.61/52.84      inference(transitivity,[status(thm)],[4495, 4444])).
% 52.61/52.84  tff(4497,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n13)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[640, 1409])).
% 52.61/52.84  tff(4498,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.61/52.84      inference(transitivity,[status(thm)],[4497, 3835])).
% 52.61/52.84  tff(4499,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4498, 4496])).
% 52.61/52.84  tff(4500,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4499, 405, 4494, 4493])).
% 52.61/52.84  tff(4501,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4500])).
% 52.61/52.84  tff(4502,plain,((~(Y!0 = n12)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4503,plain,
% 52.61/52.84      (~(Y!0 = n12)),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4502, 4354])).
% 52.61/52.84  tff(4504,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n20)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[642, 1435])).
% 52.61/52.84  tff(4505,plain,
% 52.61/52.84      (sum(n11, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(symmetry,[status(thm)],[4504])).
% 52.61/52.84  tff(4506,plain,
% 52.61/52.84      (n10 = sum(n11, n20)),
% 52.61/52.84      inference(symmetry,[status(thm)],[1612])).
% 52.61/52.84  tff(4507,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n9, n17)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[1433, 638])).
% 52.61/52.84  tff(4508,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.84      inference(transitivity,[status(thm)],[4507, 317])).
% 52.61/52.84  tff(4509,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n11)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[640, 1431])).
% 52.61/52.84  tff(4510,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.84      inference(transitivity,[status(thm)],[4509, 314])).
% 52.61/52.84  tff(4511,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4510, 4508])).
% 52.61/52.84  tff(4512,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4511, 313, 4506, 4505])).
% 52.61/52.84  tff(4513,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4512])).
% 52.61/52.84  tff(4514,plain,((~(Y!0 = n10)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4515,plain,
% 52.61/52.84      (~(Y!0 = n10)),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4514, 4354])).
% 52.61/52.84  tff(4516,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n8)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[642, 1477])).
% 52.61/52.84  tff(4517,plain,
% 52.61/52.84      (sum(n11, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(symmetry,[status(thm)],[4516])).
% 52.61/52.84  tff(4518,plain,
% 52.61/52.84      (n19 = sum(n11, n8)),
% 52.61/52.84      inference(symmetry,[status(thm)],[1135])).
% 52.61/52.84  tff(4519,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n3, n17)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[1475, 638])).
% 52.61/52.84  tff(4520,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.84      inference(transitivity,[status(thm)],[4519, 1607])).
% 52.61/52.84  tff(4521,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n5)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[640, 1473])).
% 52.61/52.84  tff(4522,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.84      inference(transitivity,[status(thm)],[4521, 3742])).
% 52.61/52.84  tff(4523,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4522, 4520])).
% 52.61/52.84  tff(4524,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4523, 139, 4518, 4517])).
% 52.61/52.84  tff(4525,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4524])).
% 52.61/52.84  tff(4526,plain,((~(Y!0 = n4)) | (~(X!1 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4527,plain,
% 52.61/52.84      (~(Y!0 = n4)),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4526, 4354])).
% 52.61/52.84  tff(4528,plain,
% 52.61/52.84      (Y!0 = n8),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[3667, 4527, 3701, 4515, 4503, 4491, 4479, 4468, 4467, 4454, 4441, 4429, 4417, 4404, 4392, 4379, 4367, 4366])).
% 52.61/52.84  tff(4529,plain,
% 52.61/52.84      (succ(Y!0) = succ(n8)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4528])).
% 52.61/52.84  tff(4530,plain,
% 52.61/52.84      (succ(Y!0) = n9),
% 52.61/52.84      inference(transitivity,[status(thm)],[4529, 527])).
% 52.61/52.84  tff(4531,plain,
% 52.61/52.84      (pred(Y!0) = pred(n8)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4528])).
% 52.61/52.84  tff(4532,plain,
% 52.61/52.84      (pred(Y!0) = n7),
% 52.61/52.84      inference(transitivity,[status(thm)],[4531, 530])).
% 52.61/52.84  tff(4533,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(Y!0)) = sum(n7, n9)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4532, 4530])).
% 52.61/52.84  tff(4534,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(Y!0)) = n16),
% 52.61/52.84      inference(transitivity,[status(thm)],[4533, 526])).
% 52.61/52.84  tff(4535,plain,
% 52.61/52.84      (succ(X!1) = succ(n16)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4354])).
% 52.61/52.84  tff(4536,plain,
% 52.61/52.84      (succ(X!1) = n17),
% 52.61/52.84      inference(transitivity,[status(thm)],[4535, 300])).
% 52.61/52.84  tff(4537,plain,
% 52.61/52.84      (pred(X!1) = pred(n16)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4354])).
% 52.61/52.84  tff(4538,plain,
% 52.61/52.84      (pred(X!1) = n15),
% 52.61/52.84      inference(transitivity,[status(thm)],[4537, 304])).
% 52.61/52.84  tff(4539,plain,
% 52.61/52.84      (sum(pred(X!1), succ(X!1)) = sum(n15, n17)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4538, 4536])).
% 52.61/52.84  tff(4540,plain,
% 52.61/52.84      (sum(pred(X!1), succ(X!1)) = n11),
% 52.61/52.84      inference(transitivity,[status(thm)],[4539, 299])).
% 52.61/52.84  tff(4541,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n16)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4540, 4534])).
% 52.61/52.84  tff(4542,plain,
% 52.61/52.84      (sum(n11, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(symmetry,[status(thm)],[4541])).
% 52.61/52.84  tff(4543,plain,
% 52.61/52.84      (sum(n11, n16) = n6),
% 52.61/52.84      inference(and_elim,[status(thm)],[9])).
% 52.61/52.84  tff(4544,plain,
% 52.61/52.84      (n6 = sum(n11, n16)),
% 52.61/52.84      inference(symmetry,[status(thm)],[4543])).
% 52.61/52.84  tff(4545,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n7, n17)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4532, 4536])).
% 52.61/52.84  tff(4546,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.84      inference(transitivity,[status(thm)],[4545, 618])).
% 52.61/52.84  tff(4547,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n15, n9)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4538, 4530])).
% 52.61/52.84  tff(4548,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.84      inference(transitivity,[status(thm)],[4547, 615])).
% 52.61/52.84  tff(4549,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4548, 4546])).
% 52.61/52.84  tff(4550,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4549, 224, 4544, 4542])).
% 52.61/52.84  tff(4551,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4550])).
% 52.61/52.84  tff(4552,plain,((Y!0 = n18) | (X!1 = n3) | (X!1 = n2) | (X!1 = n17) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4553,plain,
% 52.61/52.84      (Y!0 = n18),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4552, 3700, 3699, 3698, 3697, 3696, 24, 3695, 3694, 3693, 3692, 3691, 3690, 3689, 3688, 3687])).
% 52.61/52.84  tff(4554,plain,
% 52.61/52.84      (succ(Y!0) = succ(n18)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4553])).
% 52.61/52.84  tff(4555,plain,
% 52.61/52.84      (succ(Y!0) = n19),
% 52.61/52.84      inference(transitivity,[status(thm)],[4554, 764])).
% 52.61/52.84  tff(4556,plain,
% 52.61/52.84      (pred(Y!0) = pred(n18)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4553])).
% 52.61/52.84  tff(4557,plain,
% 52.61/52.84      (pred(Y!0) = n17),
% 52.61/52.84      inference(transitivity,[status(thm)],[4556, 768])).
% 52.61/52.84  tff(4558,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(Y!0)) = sum(n17, n19)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4557, 4555])).
% 52.61/52.84  tff(4559,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(Y!0)) = n15),
% 52.61/52.84      inference(transitivity,[status(thm)],[4558, 763])).
% 52.61/52.84  tff(4560,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n19, n15)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[2505, 1456])).
% 52.61/52.84  tff(4561,plain,
% 52.61/52.84      (sum(n19, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(symmetry,[status(thm)],[4560])).
% 52.61/52.84  tff(4562,plain,
% 52.61/52.84      (n13 = sum(n19, n15)),
% 52.61/52.84      inference(symmetry,[status(thm)],[3460])).
% 52.61/52.84  tff(4563,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n17, n0)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[1454, 2500])).
% 52.61/52.84  tff(4564,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.61/52.84      inference(transitivity,[status(thm)],[4563, 3520])).
% 52.61/52.84  tff(4565,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n19, n19)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[2503, 1452])).
% 52.61/52.84  tff(4566,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.61/52.84      inference(transitivity,[status(thm)],[4565, 776])).
% 52.61/52.84  tff(4567,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4566, 4564])).
% 52.61/52.84  tff(4568,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4567, 358, 4562, 4561])).
% 52.61/52.84  tff(4569,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4568])).
% 52.61/52.84  tff(4570,plain,((~(X!1 = n20)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4571,plain,
% 52.61/52.84      (~(X!1 = n20)),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4570, 4553])).
% 52.61/52.84  tff(4572,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n17, n15)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[2527, 1456])).
% 52.61/52.84  tff(4573,plain,
% 52.61/52.84      (sum(n17, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(symmetry,[status(thm)],[4572])).
% 52.61/52.84  tff(4574,plain,
% 52.61/52.84      (n11 = sum(n17, n15)),
% 52.61/52.84      inference(symmetry,[status(thm)],[3812])).
% 52.61/52.84  tff(4575,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n17, n20)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[1454, 2523])).
% 52.61/52.84  tff(4576,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.61/52.84      inference(transitivity,[status(thm)],[4575, 3899])).
% 52.61/52.84  tff(4577,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = sum(n18, n19)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[2525, 1452])).
% 52.61/52.84  tff(4578,plain,
% 52.61/52.84      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.61/52.84      inference(transitivity,[status(thm)],[4577, 3390])).
% 52.61/52.84  tff(4579,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.61/52.84      inference(monotonicity,[status(thm)],[4578, 4576])).
% 52.61/52.84  tff(4580,plain,
% 52.61/52.84      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.84      inference(transitivity,[status(thm)],[4579, 208, 4574, 4573])).
% 52.61/52.84  tff(4581,plain,
% 52.61/52.84      ($false),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[60, 4580])).
% 52.61/52.84  tff(4582,plain,((~(X!1 = n19)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.84  tff(4583,plain,
% 52.61/52.84      (~(X!1 = n19)),
% 52.61/52.84      inference(unit_resolution,[status(thm)],[4582, 4553])).
% 52.61/52.84  tff(4584,plain,
% 52.61/52.84      (sum(pred(Y!0), succ(X!1)) = sum(n17, n19)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1454, 767])).
% 52.61/52.85  tff(4585,plain,
% 52.61/52.85      (pred(n18) = pred(Y!0)),
% 52.61/52.85      inference(symmetry,[status(thm)],[1453])).
% 52.61/52.85  tff(4586,plain,
% 52.61/52.85      (pred(X!1) = pred(Y!0)),
% 52.61/52.85      inference(transitivity,[status(thm)],[769, 4585])).
% 52.61/52.85  tff(4587,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4586])).
% 52.61/52.85  tff(4588,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = n15),
% 52.61/52.85      inference(transitivity,[status(thm)],[4587, 4584, 763])).
% 52.61/52.85  tff(4589,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n15, n15)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4588, 1456])).
% 52.61/52.85  tff(4590,plain,
% 52.61/52.85      (sum(n15, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4589])).
% 52.61/52.85  tff(4591,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.61/52.85      inference(transitivity,[status(thm)],[4584, 763])).
% 52.61/52.85  tff(4592,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n17, n19)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[770, 1452])).
% 52.61/52.85  tff(4593,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.61/52.85      inference(transitivity,[status(thm)],[4592, 763])).
% 52.61/52.85  tff(4594,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4593, 4591])).
% 52.61/52.85  tff(4595,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4594, 4590])).
% 52.61/52.85  tff(4596,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4595])).
% 52.61/52.85  tff(4597,plain,((~(X!1 = n18)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4598,plain,
% 52.61/52.85      (~(X!1 = n18)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4597, 4553])).
% 52.61/52.85  tff(4599,plain,
% 52.61/52.85      (X!1 = n16),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[3648, 4598, 3699, 3698, 4583, 4571, 3700, 3697, 3696, 24, 3695, 3694, 3693, 3692, 3691, 3690, 3689, 3688, 3687])).
% 52.61/52.85  tff(4600,plain,
% 52.61/52.85      (succ(X!1) = succ(n16)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4599])).
% 52.61/52.85  tff(4601,plain,
% 52.61/52.85      (succ(X!1) = n17),
% 52.61/52.85      inference(transitivity,[status(thm)],[4600, 300])).
% 52.61/52.85  tff(4602,plain,
% 52.61/52.85      (pred(X!1) = pred(n16)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4599])).
% 52.61/52.85  tff(4603,plain,
% 52.61/52.85      (pred(X!1) = n15),
% 52.61/52.85      inference(transitivity,[status(thm)],[4602, 304])).
% 52.61/52.85  tff(4604,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = sum(n15, n17)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4603, 4601])).
% 52.61/52.85  tff(4605,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = n11),
% 52.61/52.85      inference(transitivity,[status(thm)],[4604, 299])).
% 52.61/52.85  tff(4606,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n11, n15)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4605, 4559])).
% 52.61/52.85  tff(4607,plain,
% 52.61/52.85      (sum(n11, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4606])).
% 52.61/52.85  tff(4608,plain,
% 52.61/52.85      (sum(n11, n15) = n5),
% 52.61/52.85      inference(and_elim,[status(thm)],[9])).
% 52.61/52.85  tff(4609,plain,
% 52.61/52.85      (n5 = sum(n11, n15)),
% 52.61/52.85      inference(symmetry,[status(thm)],[4608])).
% 52.61/52.85  tff(4610,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n17, n17)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4557, 4601])).
% 52.61/52.85  tff(4611,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.61/52.85      inference(transitivity,[status(thm)],[4610, 358])).
% 52.61/52.85  tff(4612,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n15, n19)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4603, 4555])).
% 52.61/52.85  tff(4613,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.61/52.85      inference(transitivity,[status(thm)],[4612, 3516])).
% 52.61/52.85  tff(4614,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4613, 4611])).
% 52.61/52.85  tff(4615,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4614, 51, 4609, 4607])).
% 52.61/52.85  tff(4616,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4615])).
% 52.61/52.85  tff(4617,plain,((X!1 = n17) | (X!1 = n2) | (X!1 = n3) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4618,plain,
% 52.61/52.85      ((X!1 = n2) | (X!1 = n3) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4617, 3686])).
% 52.61/52.85  tff(4619,plain,
% 52.61/52.85      (X!1 = n2),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4618, 2067, 2054, 2042, 2030, 2018, 2003, 1989, 1976, 1964, 1949, 1937, 1925, 1912])).
% 52.61/52.85  tff(4620,plain,
% 52.61/52.85      (succ(X!1) = succ(n2)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4619])).
% 52.61/52.85  tff(4621,plain,
% 52.61/52.85      (succ(X!1) = n3),
% 52.61/52.85      inference(transitivity,[status(thm)],[4620, 789])).
% 52.61/52.85  tff(4622,plain,
% 52.61/52.85      (pred(X!1) = pred(n2)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4619])).
% 52.61/52.85  tff(4623,plain,
% 52.61/52.85      (pred(X!1) = n1),
% 52.61/52.85      inference(transitivity,[status(thm)],[4622, 793])).
% 52.61/52.85  tff(4624,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = sum(n1, n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4623, 4621])).
% 52.61/52.85  tff(4625,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4624, 788])).
% 52.61/52.85  tff(4626,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n16)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4625, 1898])).
% 52.61/52.85  tff(4627,plain,
% 52.61/52.85      (sum(n4, n16) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4626])).
% 52.61/52.85  tff(4628,plain,
% 52.61/52.85      (n20 = sum(n4, n16)),
% 52.61/52.85      inference(symmetry,[status(thm)],[140])).
% 52.61/52.85  tff(4629,plain,
% 52.61/52.85      (sum(n7, n3) = n10),
% 52.61/52.85      inference(and_elim,[status(thm)],[9])).
% 52.61/52.85  tff(4630,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n7, n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1896, 4621])).
% 52.61/52.85  tff(4631,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.85      inference(transitivity,[status(thm)],[4630, 4629])).
% 52.61/52.85  tff(4632,plain,
% 52.61/52.85      (sum(n1, n9) = n10),
% 52.61/52.85      inference(and_elim,[status(thm)],[9])).
% 52.61/52.85  tff(4633,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n1, n9)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4623, 1894])).
% 52.61/52.85  tff(4634,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.85      inference(transitivity,[status(thm)],[4633, 4632])).
% 52.61/52.85  tff(4635,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4634, 4631])).
% 52.61/52.85  tff(4636,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4635, 1358, 4628, 4627])).
% 52.61/52.85  tff(4637,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4636])).
% 52.61/52.85  tff(4638,plain,(~(Y!0 = n8)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4639,plain,
% 52.61/52.85      (succ(n2) = succ(X!1)),
% 52.61/52.85      inference(symmetry,[status(thm)],[1685])).
% 52.61/52.85  tff(4640,plain,
% 52.61/52.85      (succ(Y!0) = succ(X!1)),
% 52.61/52.85      inference(transitivity,[status(thm)],[791, 4639])).
% 52.61/52.85  tff(4641,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4640])).
% 52.61/52.85  tff(4642,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n1, n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1688, 792])).
% 52.61/52.85  tff(4643,plain,
% 52.61/52.85      (sum(n1, n3) = sum(pred(X!1), succ(Y!0))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4642])).
% 52.61/52.85  tff(4644,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.61/52.85      inference(transitivity,[status(thm)],[1689, 4643])).
% 52.61/52.85  tff(4645,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4644, 4641])).
% 52.61/52.85  tff(4646,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4645])).
% 52.61/52.85  tff(4647,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4646])).
% 52.61/52.85  tff(4648,plain,((~(Y!0 = n2)) | (~(X!1 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4649,plain,
% 52.61/52.85      (~(Y!0 = n2)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4648, 1684])).
% 52.61/52.85  tff(4650,plain,
% 52.61/52.85      (Y!0 = n4),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[3667, 4649, 4638, 1891, 1876, 1864, 1852, 1837, 1823, 1810, 1795, 1783, 1771, 1756, 1744, 1731, 1717, 1703])).
% 52.61/52.85  tff(4651,plain,
% 52.61/52.85      (succ(Y!0) = succ(n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4650])).
% 52.61/52.85  tff(4652,plain,
% 52.61/52.85      (succ(Y!0) = n5),
% 52.61/52.85      inference(transitivity,[status(thm)],[4651, 36])).
% 52.61/52.85  tff(4653,plain,
% 52.61/52.85      (pred(Y!0) = pred(n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4650])).
% 52.61/52.85  tff(4654,plain,
% 52.61/52.85      (pred(Y!0) = n3),
% 52.61/52.85      inference(transitivity,[status(thm)],[4653, 166])).
% 52.61/52.85  tff(4655,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(Y!0)) = sum(n3, n5)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4654, 4652])).
% 52.61/52.85  tff(4656,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(Y!0)) = n8),
% 52.61/52.85      inference(transitivity,[status(thm)],[4655, 35])).
% 52.61/52.85  tff(4657,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n4, n8)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1690, 4656])).
% 52.61/52.85  tff(4658,plain,
% 52.61/52.85      (sum(n4, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4657])).
% 52.61/52.85  tff(4659,plain,
% 52.61/52.85      (n12 = sum(n4, n8)),
% 52.61/52.85      inference(symmetry,[status(thm)],[124])).
% 52.61/52.85  tff(4660,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n3, n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4654, 1686])).
% 52.61/52.85  tff(4661,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.85      inference(transitivity,[status(thm)],[4660, 224])).
% 52.61/52.85  tff(4662,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n1, n5)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1688, 4652])).
% 52.61/52.85  tff(4663,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.85      inference(transitivity,[status(thm)],[4662, 884])).
% 52.61/52.85  tff(4664,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4663, 4661])).
% 52.61/52.85  tff(4665,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4664, 127, 4659, 4658])).
% 52.61/52.85  tff(4666,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4665])).
% 52.61/52.85  tff(4667,plain,(~(X!1 = n2)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4668,plain,
% 52.61/52.85      ((X!1 = n3) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4618, 4667])).
% 52.61/52.85  tff(4669,plain,
% 52.61/52.85      (X!1 = n3),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4668, 1683, 1668, 1654, 1640, 1619, 1604, 1589, 1574, 1559, 1544, 1530, 1515])).
% 52.61/52.85  tff(4670,plain,
% 52.61/52.85      (succ(X!1) = succ(n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4669])).
% 52.61/52.85  tff(4671,plain,
% 52.61/52.85      (succ(X!1) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4670, 1249])).
% 52.61/52.85  tff(4672,plain,
% 52.61/52.85      (pred(X!1) = pred(n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4669])).
% 52.61/52.85  tff(4673,plain,
% 52.61/52.85      (pred(X!1) = n2),
% 52.61/52.85      inference(transitivity,[status(thm)],[4672, 1252])).
% 52.61/52.85  tff(4674,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = sum(n2, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4673, 4671])).
% 52.61/52.85  tff(4675,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = n6),
% 52.61/52.85      inference(transitivity,[status(thm)],[4674, 1248])).
% 52.61/52.85  tff(4676,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n17)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4675, 1500])).
% 52.61/52.85  tff(4677,plain,
% 52.61/52.85      (sum(n6, n17) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4676])).
% 52.61/52.85  tff(4678,plain,
% 52.61/52.85      (n2 = sum(n6, n17)),
% 52.61/52.85      inference(symmetry,[status(thm)],[1161])).
% 52.61/52.85  tff(4679,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n18, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1498, 4671])).
% 52.61/52.85  tff(4680,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.85      inference(transitivity,[status(thm)],[4679, 807])).
% 52.61/52.85  tff(4681,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n2, n20)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4673, 1495])).
% 52.61/52.85  tff(4682,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.85      inference(transitivity,[status(thm)],[4681, 2532])).
% 52.61/52.85  tff(4683,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4682, 4680])).
% 52.61/52.85  tff(4684,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4683, 599, 4678, 4677])).
% 52.61/52.85  tff(4685,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4684])).
% 52.61/52.85  tff(4686,plain,(~(Y!0 = n19)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4687,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n2)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1256, 635])).
% 52.61/52.85  tff(4688,plain,
% 52.61/52.85      (sum(n6, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4687])).
% 52.61/52.85  tff(4689,plain,
% 52.61/52.85      (n8 = sum(n6, n2)),
% 52.61/52.85      inference(symmetry,[status(thm)],[737])).
% 52.61/52.85  tff(4690,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n0, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[633, 1251])).
% 52.61/52.85  tff(4691,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4690, 3104])).
% 52.61/52.85  tff(4692,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n2, n2)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1254, 630])).
% 52.61/52.85  tff(4693,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4692, 583])).
% 52.61/52.85  tff(4694,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4693, 4691])).
% 52.61/52.85  tff(4695,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4694, 264, 4689, 4688])).
% 52.61/52.85  tff(4696,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4695])).
% 52.61/52.85  tff(4697,plain,((~(Y!0 = n1)) | (~(X!1 = n3))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4698,plain,
% 52.61/52.85      (~(Y!0 = n1)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4697, 1247])).
% 52.61/52.85  tff(4699,plain,
% 52.61/52.85      ((Y!0 = n19) | (Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[3667, 4638])).
% 52.61/52.85  tff(4700,plain,
% 52.61/52.85      (Y!0 = n2),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4699, 4698, 4686, 1490, 1470, 1449, 1428, 1406, 1383, 1369, 1354, 1340, 1326, 1311, 1298, 1284, 1270])).
% 52.61/52.85  tff(4701,plain,
% 52.61/52.85      (succ(Y!0) = succ(n2)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4700])).
% 52.61/52.85  tff(4702,plain,
% 52.61/52.85      (succ(Y!0) = n3),
% 52.61/52.85      inference(transitivity,[status(thm)],[4701, 789])).
% 52.61/52.85  tff(4703,plain,
% 52.61/52.85      (pred(Y!0) = pred(n2)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4700])).
% 52.61/52.85  tff(4704,plain,
% 52.61/52.85      (pred(Y!0) = n1),
% 52.61/52.85      inference(transitivity,[status(thm)],[4703, 793])).
% 52.61/52.85  tff(4705,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(Y!0)) = sum(n1, n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4704, 4702])).
% 52.61/52.85  tff(4706,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(Y!0)) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4705, 788])).
% 52.61/52.85  tff(4707,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n6, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1256, 4706])).
% 52.61/52.85  tff(4708,plain,
% 52.61/52.85      (sum(n6, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4707])).
% 52.61/52.85  tff(4709,plain,
% 52.61/52.85      (n10 = sum(n6, n4)),
% 52.61/52.85      inference(symmetry,[status(thm)],[1359])).
% 52.61/52.85  tff(4710,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n1, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4704, 1251])).
% 52.61/52.85  tff(4711,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.85      inference(transitivity,[status(thm)],[4710, 837])).
% 52.61/52.85  tff(4712,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n2, n3)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1254, 4702])).
% 52.61/52.85  tff(4713,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.85      inference(transitivity,[status(thm)],[4712, 2777])).
% 52.61/52.85  tff(4714,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4713, 4711])).
% 52.61/52.85  tff(4715,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4714, 313, 4709, 4708])).
% 52.61/52.85  tff(4716,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4715])).
% 52.61/52.85  tff(4717,plain,(~(X!1 = n3)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4718,plain,
% 52.61/52.85      ((Y!0 = n19) | (Y!0 = n18) | (X!1 = n2) | (X!1 = n3) | (X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4313, 3686])).
% 52.61/52.85  tff(4719,plain,
% 52.61/52.85      ((Y!0 = n19) | (Y!0 = n18) | (X!1 = n3) | (X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4718, 4667])).
% 52.61/52.85  tff(4720,plain,
% 52.61/52.85      ((Y!0 = n18) | (X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4719, 4686, 4717])).
% 52.61/52.85  tff(4721,plain,
% 52.61/52.85      (X!1 = n13),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4720, 1246, 1231, 1219, 1204, 1199, 1186, 1171, 1157, 1142, 1128, 1113, 1098, 1083, 1070])).
% 52.61/52.85  tff(4722,plain,
% 52.61/52.85      (succ(X!1) = succ(n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4721])).
% 52.61/52.85  tff(4723,plain,
% 52.61/52.85      (succ(X!1) = n14),
% 52.61/52.85      inference(transitivity,[status(thm)],[4722, 23])).
% 52.61/52.85  tff(4724,plain,
% 52.61/52.85      (pred(X!1) = pred(n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4721])).
% 52.61/52.85  tff(4725,plain,
% 52.61/52.85      (pred(X!1) = n12),
% 52.61/52.85      inference(transitivity,[status(thm)],[4724, 328])).
% 52.61/52.85  tff(4726,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = sum(n12, n14)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4725, 4723])).
% 52.61/52.85  tff(4727,plain,
% 52.61/52.85      (sum(pred(X!1), succ(X!1)) = n5),
% 52.61/52.85      inference(transitivity,[status(thm)],[4726, 22])).
% 52.61/52.85  tff(4728,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n14)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4727, 1055])).
% 52.61/52.85  tff(4729,plain,
% 52.61/52.85      (sum(n5, n14) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4728])).
% 52.61/52.85  tff(4730,plain,
% 52.61/52.85      (n19 = sum(n5, n14)),
% 52.61/52.85      inference(symmetry,[status(thm)],[958])).
% 52.61/52.85  tff(4731,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n6, n14)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1053, 4723])).
% 52.61/52.85  tff(4732,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.85      inference(transitivity,[status(thm)],[4731, 393])).
% 52.61/52.85  tff(4733,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n12, n8)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4725, 1051])).
% 52.61/52.85  tff(4734,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.85      inference(transitivity,[status(thm)],[4733, 390])).
% 52.61/52.85  tff(4735,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4734, 4732])).
% 52.61/52.85  tff(4736,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4735, 139, 4730, 4729])).
% 52.61/52.85  tff(4737,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4736])).
% 52.61/52.85  tff(4738,plain,(~(Y!0 = n7)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4739,assumption,(~(Y!0 = n0)), introduced(assumption)).
% 52.61/52.85  tff(4740,assumption,(~(Y!0 = n13)), introduced(assumption)).
% 52.61/52.85  tff(4741,assumption,(~(Y!0 = n9)), introduced(assumption)).
% 52.61/52.85  tff(4742,assumption,(~(Y!0 = n5)), introduced(assumption)).
% 52.61/52.85  tff(4743,assumption,(~(Y!0 = n6)), introduced(assumption)).
% 52.61/52.85  tff(4744,assumption,(~(Y!0 = n15)), introduced(assumption)).
% 52.61/52.85  tff(4745,assumption,(~(Y!0 = n14)), introduced(assumption)).
% 52.61/52.85  tff(4746,assumption,(~(Y!0 = n7)), introduced(assumption)).
% 52.61/52.85  tff(4747,assumption,(~(Y!0 = n1)), introduced(assumption)).
% 52.61/52.85  tff(4748,assumption,(~(Y!0 = n2)), introduced(assumption)).
% 52.61/52.85  tff(4749,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[534, 1392])).
% 52.61/52.85  tff(4750,plain,
% 52.61/52.85      (sum(n16, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4749])).
% 52.61/52.85  tff(4751,plain,
% 52.61/52.85      (n8 = sum(n16, n13)),
% 52.61/52.85      inference(symmetry,[status(thm)],[2254])).
% 52.61/52.85  tff(4752,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n16, n9)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1390, 529])).
% 52.61/52.85  tff(4753,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4752, 581])).
% 52.61/52.85  tff(4754,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n7, n18)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[532, 1387])).
% 52.61/52.85  tff(4755,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.85      inference(transitivity,[status(thm)],[4754, 2278])).
% 52.61/52.85  tff(4756,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4755, 4753])).
% 52.61/52.85  tff(4757,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4756, 264, 4751, 4750])).
% 52.61/52.85  tff(4758,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4757])).
% 52.61/52.85  tff(4759,plain,((~(X!1 = n8)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4760,plain,
% 52.61/52.85      (~(X!1 = n8)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4759, 1385])).
% 52.61/52.85  tff(4761,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[804, 1392])).
% 52.61/52.85  tff(4762,plain,
% 52.61/52.85      (sum(n18, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4761])).
% 52.61/52.85  tff(4763,plain,
% 52.61/52.85      (n10 = sum(n18, n13)),
% 52.61/52.85      inference(symmetry,[status(thm)],[1609])).
% 52.61/52.85  tff(4764,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n16, n10)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1390, 800])).
% 52.61/52.85  tff(4765,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.85      inference(transitivity,[status(thm)],[4764, 552])).
% 52.61/52.85  tff(4766,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n8, n18)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[802, 1387])).
% 52.61/52.85  tff(4767,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.85      inference(transitivity,[status(thm)],[4766, 173])).
% 52.61/52.85  tff(4768,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4767, 4765])).
% 52.61/52.85  tff(4769,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4768, 313, 4763, 4762])).
% 52.61/52.85  tff(4770,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4769])).
% 52.61/52.85  tff(4771,plain,((~(X!1 = n9)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4772,plain,
% 52.61/52.85      (~(X!1 = n9)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4771, 1385])).
% 52.61/52.85  tff(4773,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[244, 1392])).
% 52.61/52.85  tff(4774,plain,
% 52.61/52.85      (sum(n20, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4773])).
% 52.61/52.85  tff(4775,plain,
% 52.61/52.85      (n12 = sum(n20, n13)),
% 52.61/52.85      inference(symmetry,[status(thm)],[453])).
% 52.61/52.85  tff(4776,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n16, n11)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1390, 239])).
% 52.61/52.85  tff(4777,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.85      inference(transitivity,[status(thm)],[4776, 613])).
% 52.61/52.85  tff(4778,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n9, n18)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[242, 1387])).
% 52.61/52.85  tff(4779,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.85      inference(transitivity,[status(thm)],[4778, 222])).
% 52.61/52.85  tff(4780,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4779, 4777])).
% 52.61/52.85  tff(4781,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4780, 127, 4775, 4774])).
% 52.61/52.85  tff(4782,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4781])).
% 52.61/52.85  tff(4783,plain,((~(X!1 = n10)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4784,plain,
% 52.61/52.85      (~(X!1 = n10)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4783, 1385])).
% 52.61/52.85  tff(4785,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[433, 1392])).
% 52.61/52.85  tff(4786,plain,
% 52.61/52.85      (sum(n1, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4785])).
% 52.61/52.85  tff(4787,plain,
% 52.61/52.85      (n14 = sum(n1, n13)),
% 52.61/52.85      inference(symmetry,[status(thm)],[854])).
% 52.61/52.85  tff(4788,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n16, n12)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1390, 428])).
% 52.61/52.85  tff(4789,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.61/52.85      inference(transitivity,[status(thm)],[4788, 567])).
% 52.61/52.85  tff(4790,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n10, n18)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[431, 1387])).
% 52.61/52.85  tff(4791,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.61/52.85      inference(transitivity,[status(thm)],[4790, 190])).
% 52.61/52.85  tff(4792,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4791, 4789])).
% 52.61/52.85  tff(4793,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4792, 405, 4787, 4786])).
% 52.61/52.85  tff(4794,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4793])).
% 52.61/52.85  tff(4795,plain,((~(X!1 = n11)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4796,plain,
% 52.61/52.85      (~(X!1 = n11)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4795, 1385])).
% 52.61/52.85  tff(4797,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[70, 1392])).
% 52.61/52.85  tff(4798,plain,
% 52.61/52.85      (sum(n9, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4797])).
% 52.61/52.85  tff(4799,plain,
% 52.61/52.85      (sum(n9, n13) = n1),
% 52.61/52.85      inference(and_elim,[status(thm)],[9])).
% 52.61/52.85  tff(4800,plain,
% 52.61/52.85      (n1 = sum(n9, n13)),
% 52.61/52.85      inference(symmetry,[status(thm)],[4799])).
% 52.61/52.85  tff(4801,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n16, n16)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1390, 66])).
% 52.61/52.85  tff(4802,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.61/52.85      inference(transitivity,[status(thm)],[4801, 208])).
% 52.61/52.85  tff(4803,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n14, n18)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[68, 1387])).
% 52.61/52.85  tff(4804,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.61/52.85      inference(transitivity,[status(thm)],[4803, 206])).
% 52.61/52.85  tff(4805,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[4804, 4802])).
% 52.61/52.85  tff(4806,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(transitivity,[status(thm)],[4805, 438, 4800, 4798])).
% 52.61/52.85  tff(4807,plain,
% 52.61/52.85      ($false),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[60, 4806])).
% 52.61/52.85  tff(4808,plain,((~(X!1 = n15)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.85  tff(4809,plain,
% 52.61/52.85      (~(X!1 = n15)),
% 52.61/52.85      inference(unit_resolution,[status(thm)],[4808, 1385])).
% 52.61/52.85  tff(4810,plain,
% 52.61/52.85      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[340, 1392])).
% 52.61/52.85  tff(4811,plain,
% 52.61/52.85      (sum(n3, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.85      inference(symmetry,[status(thm)],[4810])).
% 52.61/52.85  tff(4812,plain,
% 52.61/52.85      (sum(n3, n13) = n16),
% 52.61/52.85      inference(and_elim,[status(thm)],[9])).
% 52.61/52.85  tff(4813,plain,
% 52.61/52.85      (n16 = sum(n3, n13)),
% 52.61/52.85      inference(symmetry,[status(thm)],[4812])).
% 52.61/52.85  tff(4814,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = sum(n16, n13)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[1390, 335])).
% 52.61/52.85  tff(4815,plain,
% 52.61/52.85      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.85      inference(transitivity,[status(thm)],[4814, 2254])).
% 52.61/52.85  tff(4816,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = sum(n11, n18)),
% 52.61/52.85      inference(monotonicity,[status(thm)],[338, 1387])).
% 52.61/52.85  tff(4817,plain,
% 52.61/52.85      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.86      inference(transitivity,[status(thm)],[4816, 2251])).
% 52.61/52.86  tff(4818,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4817, 4815])).
% 52.61/52.86  tff(4819,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4818, 209, 4813, 4811])).
% 52.61/52.86  tff(4820,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4819])).
% 52.61/52.86  tff(4821,plain,((~(X!1 = n12)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4822,plain,
% 52.61/52.86      (~(X!1 = n12)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4821, 1385])).
% 52.61/52.86  tff(4823,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n13)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[170, 1392])).
% 52.61/52.86  tff(4824,plain,
% 52.61/52.86      (sum(n8, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4823])).
% 52.61/52.86  tff(4825,plain,
% 52.61/52.86      (sum(n8, n13) = n0),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(4826,plain,
% 52.61/52.86      (n0 = sum(n8, n13)),
% 52.61/52.86      inference(symmetry,[status(thm)],[4825])).
% 52.61/52.86  tff(4827,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n16, n5)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1390, 165])).
% 52.61/52.86  tff(4828,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.86      inference(transitivity,[status(thm)],[4827, 2294])).
% 52.61/52.86  tff(4829,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n3, n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[168, 1387])).
% 52.61/52.86  tff(4830,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.86      inference(transitivity,[status(thm)],[4829, 2291])).
% 52.61/52.86  tff(4831,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4830, 4828])).
% 52.61/52.86  tff(4832,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4831, 75, 4826, 4824])).
% 52.61/52.86  tff(4833,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4832])).
% 52.61/52.86  tff(4834,plain,((~(X!1 = n4)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4835,plain,
% 52.61/52.86      (~(X!1 = n4)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4834, 1385])).
% 52.61/52.86  tff(4836,plain,
% 52.61/52.86      (~(X!1 = n16)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4490, 1385])).
% 52.61/52.86  tff(4837,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n13)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[187, 1392])).
% 52.61/52.86  tff(4838,plain,
% 52.61/52.86      (sum(n10, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4837])).
% 52.61/52.86  tff(4839,plain,
% 52.61/52.86      (n2 = sum(n10, n13)),
% 52.61/52.86      inference(symmetry,[status(thm)],[2917])).
% 52.61/52.86  tff(4840,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n16, n6)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1390, 101])).
% 52.61/52.86  tff(4841,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.86      inference(transitivity,[status(thm)],[4840, 2149])).
% 52.61/52.86  tff(4842,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n4, n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[111, 1387])).
% 52.61/52.86  tff(4843,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.86      inference(transitivity,[status(thm)],[4842, 1734])).
% 52.61/52.86  tff(4844,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4843, 4841])).
% 52.61/52.86  tff(4845,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4844, 599, 4839, 4838])).
% 52.61/52.86  tff(4846,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4845])).
% 52.61/52.86  tff(4847,plain,((~(X!1 = n5)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4848,plain,
% 52.61/52.86      (~(X!1 = n5)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4847, 1385])).
% 52.61/52.86  tff(4849,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n13)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[937, 1392])).
% 52.61/52.86  tff(4850,plain,
% 52.61/52.86      (sum(n12, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4849])).
% 52.61/52.86  tff(4851,plain,
% 52.61/52.86      (n4 = sum(n12, n13)),
% 52.61/52.86      inference(symmetry,[status(thm)],[344])).
% 52.61/52.86  tff(4852,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n16, n7)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1390, 933])).
% 52.61/52.86  tff(4853,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.86      inference(transitivity,[status(thm)],[4852, 597])).
% 52.61/52.86  tff(4854,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n5, n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[935, 1387])).
% 52.61/52.86  tff(4855,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.86      inference(transitivity,[status(thm)],[4854, 2161])).
% 52.61/52.86  tff(4856,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4855, 4853])).
% 52.61/52.86  tff(4857,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4856, 583, 4851, 4850])).
% 52.61/52.86  tff(4858,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4857])).
% 52.61/52.86  tff(4859,plain,((~(X!1 = n6)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4860,plain,
% 52.61/52.86      (~(X!1 = n6)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4859, 1385])).
% 52.61/52.86  tff(4861,plain,
% 52.61/52.86      ((Y!0 = n18) <=> (n17 = n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1385])).
% 52.61/52.86  tff(4862,plain,
% 52.61/52.86      ((n17 = n18) <=> (Y!0 = n18)),
% 52.61/52.86      inference(symmetry,[status(thm)],[4861])).
% 52.61/52.86  tff(4863,plain,
% 52.61/52.86      ((~(n17 = n18)) <=> (~(Y!0 = n18))),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4862])).
% 52.61/52.86  tff(4864,plain,
% 52.61/52.86      (~(n17 = n18)),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(4865,plain,
% 52.61/52.86      (~(Y!0 = n18)),
% 52.61/52.86      inference(modus_ponens,[status(thm)],[4864, 4863])).
% 52.61/52.86  tff(4866,plain,
% 52.61/52.86      (~(X!1 = n18)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[3844, 1385])).
% 52.61/52.86  tff(4867,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n13)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[46, 1392])).
% 52.61/52.86  tff(4868,plain,
% 52.61/52.86      (sum(n14, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4867])).
% 52.61/52.86  tff(4869,plain,
% 52.61/52.86      (sum(n14, n13) = n6),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(4870,plain,
% 52.61/52.86      (n6 = sum(n14, n13)),
% 52.61/52.86      inference(symmetry,[status(thm)],[4869])).
% 52.61/52.86  tff(4871,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n16, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1390, 41])).
% 52.61/52.86  tff(4872,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.86      inference(transitivity,[status(thm)],[4871, 2216])).
% 52.61/52.86  tff(4873,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n6, n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[44, 1387])).
% 52.61/52.86  tff(4874,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.86      inference(transitivity,[status(thm)],[4873, 1287])).
% 52.61/52.86  tff(4875,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4874, 4872])).
% 52.61/52.86  tff(4876,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4875, 224, 4870, 4868])).
% 52.61/52.86  tff(4877,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4876])).
% 52.61/52.86  tff(4878,plain,((~(X!1 = n7)) | (~(Y!0 = n17))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4879,plain,
% 52.61/52.86      (~(X!1 = n7)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4878, 1385])).
% 52.61/52.86  tff(4880,plain,
% 52.61/52.86      (X!1 = n14),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4720, 4879, 24, 4866, 4865, 4860, 4848, 4836, 4835, 4822, 4809, 4796, 4784, 4772, 4760])).
% 52.61/52.86  tff(4881,plain,
% 52.61/52.86      (succ(X!1) = succ(n14)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4880])).
% 52.61/52.86  tff(4882,plain,
% 52.61/52.86      (succ(X!1) = n15),
% 52.61/52.86      inference(transitivity,[status(thm)],[4881, 11])).
% 52.61/52.86  tff(4883,plain,
% 52.61/52.86      (pred(X!1) = pred(n14)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4880])).
% 52.61/52.86  tff(4884,plain,
% 52.61/52.86      (pred(X!1) = n13),
% 52.61/52.86      inference(transitivity,[status(thm)],[4883, 279])).
% 52.61/52.86  tff(4885,plain,
% 52.61/52.86      (sum(pred(X!1), succ(X!1)) = sum(n13, n15)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4884, 4882])).
% 52.61/52.86  tff(4886,plain,
% 52.61/52.86      (sum(pred(X!1), succ(X!1)) = n7),
% 52.61/52.86      inference(transitivity,[status(thm)],[4885, 10])).
% 52.61/52.86  tff(4887,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n13)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4886, 1392])).
% 52.61/52.86  tff(4888,plain,
% 52.61/52.86      (sum(n7, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4887])).
% 52.61/52.86  tff(4889,plain,
% 52.61/52.86      (n20 = sum(n7, n13)),
% 52.61/52.86      inference(symmetry,[status(thm)],[2008])).
% 52.61/52.86  tff(4890,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n16, n15)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1390, 4882])).
% 52.61/52.86  tff(4891,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.86      inference(transitivity,[status(thm)],[4890, 2202])).
% 52.61/52.86  tff(4892,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n13, n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4884, 1387])).
% 52.61/52.86  tff(4893,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.86      inference(transitivity,[status(thm)],[4892, 2132])).
% 52.61/52.86  tff(4894,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4893, 4891])).
% 52.61/52.86  tff(4895,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4894, 1358, 4889, 4888])).
% 52.61/52.86  tff(4896,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4895])).
% 52.61/52.86  tff(4897,plain,((~(Y!0 = n17)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4898,plain,
% 52.61/52.86      (~(Y!0 = n17)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4897, 24])).
% 52.61/52.86  tff(4899,assumption,(~(Y!0 = n16)), introduced(assumption)).
% 52.61/52.86  tff(4900,assumption,(~(Y!0 = n17)), introduced(assumption)).
% 52.61/52.86  tff(4901,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[46, 1435])).
% 52.61/52.86  tff(4902,plain,
% 52.61/52.86      (sum(n14, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4901])).
% 52.61/52.86  tff(4903,plain,
% 52.61/52.86      (n13 = sum(n14, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1661])).
% 52.61/52.86  tff(4904,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 41])).
% 52.61/52.86  tff(4905,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.61/52.86      inference(transitivity,[status(thm)],[4904, 1091])).
% 52.61/52.86  tff(4906,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n6, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[44, 1431])).
% 52.61/52.86  tff(4907,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.61/52.86      inference(transitivity,[status(thm)],[4906, 1088])).
% 52.61/52.86  tff(4908,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4907, 4905])).
% 52.61/52.86  tff(4909,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4908, 358, 4903, 4902])).
% 52.61/52.86  tff(4910,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4909])).
% 52.61/52.86  tff(4911,plain,((~(X!1 = n7)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4912,plain,
% 52.61/52.86      (~(X!1 = n7)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4911, 1429])).
% 52.61/52.86  tff(4913,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[534, 1435])).
% 52.61/52.86  tff(4914,plain,
% 52.61/52.86      (sum(n16, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4913])).
% 52.61/52.86  tff(4915,plain,
% 52.61/52.86      (n15 = sum(n16, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[2189])).
% 52.61/52.86  tff(4916,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n9)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 529])).
% 52.61/52.86  tff(4917,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.61/52.86      inference(transitivity,[status(thm)],[4916, 1315])).
% 52.61/52.86  tff(4918,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n7, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[532, 1431])).
% 52.61/52.86  tff(4919,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.61/52.86      inference(transitivity,[status(thm)],[4918, 1980])).
% 52.61/52.86  tff(4920,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4919, 4917])).
% 52.61/52.86  tff(4921,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4920, 374, 4915, 4914])).
% 52.61/52.86  tff(4922,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4921])).
% 52.61/52.86  tff(4923,plain,((~(X!1 = n8)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4924,plain,
% 52.61/52.86      (~(X!1 = n8)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4923, 1429])).
% 52.61/52.86  tff(4925,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[804, 1435])).
% 52.61/52.86  tff(4926,plain,
% 52.61/52.86      (sum(n18, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4925])).
% 52.61/52.86  tff(4927,plain,
% 52.61/52.86      (n17 = sum(n18, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1491])).
% 52.61/52.86  tff(4928,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n10)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 800])).
% 52.61/52.86  tff(4929,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.86      inference(transitivity,[status(thm)],[4928, 137])).
% 52.61/52.86  tff(4930,plain,
% 52.61/52.86      (sum(n8, n11) = n19),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(4931,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n8, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[802, 1431])).
% 52.61/52.86  tff(4932,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.86      inference(transitivity,[status(thm)],[4931, 4930])).
% 52.61/52.86  tff(4933,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4932, 4929])).
% 52.61/52.86  tff(4934,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4933, 776, 4927, 4926])).
% 52.61/52.86  tff(4935,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4934])).
% 52.61/52.86  tff(4936,plain,((~(X!1 = n9)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4937,plain,
% 52.61/52.86      (~(X!1 = n9)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4936, 1429])).
% 52.61/52.86  tff(4938,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 239])).
% 52.61/52.86  tff(4939,plain,
% 52.61/52.86      (pred(n10) = pred(Y!0)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1432])).
% 52.61/52.86  tff(4940,plain,
% 52.61/52.86      (pred(X!1) = pred(Y!0)),
% 52.61/52.86      inference(transitivity,[status(thm)],[241, 4939])).
% 52.61/52.86  tff(4941,plain,
% 52.61/52.86      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4940])).
% 52.61/52.86  tff(4942,plain,
% 52.61/52.86      (sum(pred(X!1), succ(X!1)) = n20),
% 52.61/52.86      inference(transitivity,[status(thm)],[4941, 4938, 236])).
% 52.61/52.86  tff(4943,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4942, 1435])).
% 52.61/52.86  tff(4944,plain,
% 52.61/52.86      (sum(n20, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4943])).
% 52.61/52.86  tff(4945,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.86      inference(transitivity,[status(thm)],[4938, 236])).
% 52.61/52.86  tff(4946,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n9, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[242, 1431])).
% 52.61/52.86  tff(4947,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.86      inference(transitivity,[status(thm)],[4946, 236])).
% 52.61/52.86  tff(4948,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4947, 4945])).
% 52.61/52.86  tff(4949,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4948, 4944])).
% 52.61/52.86  tff(4950,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4949])).
% 52.61/52.86  tff(4951,plain,((~(X!1 = n10)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4952,plain,
% 52.61/52.86      (~(X!1 = n10)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4951, 1429])).
% 52.61/52.86  tff(4953,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[433, 1435])).
% 52.61/52.86  tff(4954,plain,
% 52.61/52.86      (sum(n1, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4953])).
% 52.61/52.86  tff(4955,plain,
% 52.61/52.86      (n0 = sum(n1, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1803])).
% 52.61/52.86  tff(4956,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n12)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 428])).
% 52.61/52.86  tff(4957,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.86      inference(transitivity,[status(thm)],[4956, 73])).
% 52.61/52.86  tff(4958,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n10, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[431, 1431])).
% 52.61/52.86  tff(4959,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.86      inference(transitivity,[status(thm)],[4958, 2889])).
% 52.61/52.86  tff(4960,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4959, 4957])).
% 52.61/52.86  tff(4961,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4960, 75, 4955, 4954])).
% 52.61/52.86  tff(4962,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4961])).
% 52.61/52.86  tff(4963,plain,((~(X!1 = n11)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4964,plain,
% 52.61/52.86      (~(X!1 = n11)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4963, 1429])).
% 52.61/52.86  tff(4965,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[340, 1435])).
% 52.61/52.86  tff(4966,plain,
% 52.61/52.86      (sum(n3, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4965])).
% 52.61/52.86  tff(4967,plain,
% 52.61/52.86      (n2 = sum(n3, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1676])).
% 52.61/52.86  tff(4968,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n13)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 335])).
% 52.61/52.86  tff(4969,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.86      inference(transitivity,[status(thm)],[4968, 4799])).
% 52.61/52.86  tff(4970,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n11, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[338, 1431])).
% 52.61/52.86  tff(4971,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.86      inference(transitivity,[status(thm)],[4970, 438])).
% 52.61/52.86  tff(4972,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4971, 4969])).
% 52.61/52.86  tff(4973,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4972, 599, 4967, 4966])).
% 52.61/52.86  tff(4974,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4973])).
% 52.61/52.86  tff(4975,plain,((~(X!1 = n12)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4976,plain,
% 52.61/52.86      (~(X!1 = n12)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4975, 1429])).
% 52.61/52.86  tff(4977,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[170, 1435])).
% 52.61/52.86  tff(4978,plain,
% 52.61/52.86      (sum(n8, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4977])).
% 52.61/52.86  tff(4979,plain,
% 52.61/52.86      (n7 = sum(n8, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1567])).
% 52.61/52.86  tff(4980,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n5)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 165])).
% 52.61/52.86  tff(4981,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.61/52.86      inference(transitivity,[status(thm)],[4980, 403])).
% 52.61/52.86  tff(4982,plain,
% 52.61/52.86      (sum(n3, n11) = n14),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(4983,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n3, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[168, 1431])).
% 52.61/52.86  tff(4984,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.61/52.86      inference(transitivity,[status(thm)],[4983, 4982])).
% 52.61/52.86  tff(4985,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4984, 4981])).
% 52.61/52.86  tff(4986,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4985, 192, 4979, 4978])).
% 52.61/52.86  tff(4987,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4986])).
% 52.61/52.86  tff(4988,plain,((~(X!1 = n4)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(4989,plain,
% 52.61/52.86      (~(X!1 = n4)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4988, 1429])).
% 52.61/52.86  tff(4990,plain,
% 52.61/52.86      (~(X!1 = n16)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4514, 1429])).
% 52.61/52.86  tff(4991,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[187, 1435])).
% 52.61/52.86  tff(4992,plain,
% 52.61/52.86      (sum(n10, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[4991])).
% 52.61/52.86  tff(4993,plain,
% 52.61/52.86      (n9 = sum(n10, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1597])).
% 52.61/52.86  tff(4994,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n6)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 101])).
% 52.61/52.86  tff(4995,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.61/52.86      inference(transitivity,[status(thm)],[4994, 2446])).
% 52.61/52.86  tff(4996,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n4, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[111, 1431])).
% 52.61/52.86  tff(4997,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.61/52.86      inference(transitivity,[status(thm)],[4996, 1826])).
% 52.61/52.86  tff(4998,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[4997, 4995])).
% 52.61/52.86  tff(4999,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[4998, 513, 4993, 4992])).
% 52.61/52.86  tff(5000,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 4999])).
% 52.61/52.86  tff(5001,plain,((~(X!1 = n5)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(5002,plain,
% 52.61/52.86      (~(X!1 = n5)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5001, 1429])).
% 52.61/52.86  tff(5003,plain,
% 52.61/52.86      ((Y!0 = n18) <=> (n10 = n18)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1429])).
% 52.61/52.86  tff(5004,plain,
% 52.61/52.86      ((n10 = n18) <=> (Y!0 = n18)),
% 52.61/52.86      inference(symmetry,[status(thm)],[5003])).
% 52.61/52.86  tff(5005,plain,
% 52.61/52.86      ((~(n10 = n18)) <=> (~(Y!0 = n18))),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5004])).
% 52.61/52.86  tff(5006,plain,
% 52.61/52.86      (~(n10 = n18)),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(5007,plain,
% 52.61/52.86      (~(Y!0 = n18)),
% 52.61/52.86      inference(modus_ponens,[status(thm)],[5006, 5005])).
% 52.61/52.86  tff(5008,plain,
% 52.61/52.86      (~(X!1 = n18)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[3871, 1429])).
% 52.61/52.86  tff(5009,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[937, 1435])).
% 52.61/52.86  tff(5010,plain,
% 52.61/52.86      (sum(n12, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[5009])).
% 52.61/52.86  tff(5011,plain,
% 52.61/52.86      (n11 = sum(n12, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1633])).
% 52.61/52.86  tff(5012,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n7)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 933])).
% 52.61/52.86  tff(5013,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.61/52.86      inference(transitivity,[status(thm)],[5012, 252])).
% 52.61/52.86  tff(5014,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n5, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[935, 1431])).
% 52.61/52.86  tff(5015,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.61/52.86      inference(transitivity,[status(thm)],[5014, 249])).
% 52.61/52.86  tff(5016,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5015, 5013])).
% 52.61/52.86  tff(5017,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[5016, 208, 5011, 5010])).
% 52.61/52.86  tff(5018,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 5017])).
% 52.61/52.86  tff(5019,plain,((~(X!1 = n6)) | (~(Y!0 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(5020,plain,
% 52.61/52.86      (~(X!1 = n6)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5019, 1429])).
% 52.61/52.86  tff(5021,plain,
% 52.61/52.86      (X!1 = n15),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4720, 5020, 24, 5008, 5007, 5002, 3696, 4990, 4989, 4976, 4964, 4952, 4937, 4924, 4912])).
% 52.61/52.86  tff(5022,plain,
% 52.61/52.86      (succ(X!1) = succ(n15)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5021])).
% 52.61/52.86  tff(5023,plain,
% 52.61/52.86      (succ(X!1) = n16),
% 52.61/52.86      inference(transitivity,[status(thm)],[5022, 13])).
% 52.61/52.86  tff(5024,plain,
% 52.61/52.86      (pred(X!1) = pred(n15)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5021])).
% 52.61/52.86  tff(5025,plain,
% 52.61/52.86      (pred(X!1) = n14),
% 52.61/52.86      inference(transitivity,[status(thm)],[5024, 17])).
% 52.61/52.86  tff(5026,plain,
% 52.61/52.86      (sum(pred(X!1), succ(X!1)) = sum(n14, n16)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5025, 5023])).
% 52.61/52.86  tff(5027,plain,
% 52.61/52.86      (sum(pred(X!1), succ(X!1)) = n9),
% 52.61/52.86      inference(transitivity,[status(thm)],[5026, 12])).
% 52.61/52.86  tff(5028,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n20)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5027, 1435])).
% 52.61/52.86  tff(5029,plain,
% 52.61/52.86      (sum(n9, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[5028])).
% 52.61/52.86  tff(5030,plain,
% 52.61/52.86      (n8 = sum(n9, n20)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1582])).
% 52.61/52.86  tff(5031,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n9, n16)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1433, 5023])).
% 52.61/52.86  tff(5032,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.86      inference(transitivity,[status(thm)],[5031, 268])).
% 52.61/52.86  tff(5033,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n14, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5025, 1431])).
% 52.61/52.86  tff(5034,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.86      inference(transitivity,[status(thm)],[5033, 265])).
% 52.61/52.86  tff(5035,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5034, 5032])).
% 52.61/52.86  tff(5036,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[5035, 264, 5030, 5029])).
% 52.61/52.86  tff(5037,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 5036])).
% 52.61/52.86  tff(5038,plain,((~(Y!0 = n10)) | (X!1 = n13) | (X!1 = n14)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(5039,plain,
% 52.61/52.86      (~(Y!0 = n10)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5038, 3696, 24])).
% 52.61/52.86  tff(5040,assumption,(~(Y!0 = n12)), introduced(assumption)).
% 52.61/52.86  tff(5041,assumption,(~(Y!0 = n10)), introduced(assumption)).
% 52.61/52.86  tff(5042,plain,
% 52.61/52.86      ((Y!0 = n18) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n15) | (Y!0 = n14) | (Y!0 = n13) | (Y!0 = n12) | (Y!0 = n10) | (Y!0 = n9) | (Y!0 = n7) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n4) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[4699, 4686])).
% 52.61/52.86  tff(5043,plain,
% 52.61/52.86      (Y!0 = n4),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5042, 3701, 4748, 4747, 5041, 5040, 4900, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.86  tff(5044,plain,
% 52.61/52.86      (succ(Y!0) = succ(n4)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5043])).
% 52.61/52.86  tff(5045,plain,
% 52.61/52.86      (succ(Y!0) = n5),
% 52.61/52.86      inference(transitivity,[status(thm)],[5044, 36])).
% 52.61/52.86  tff(5046,plain,
% 52.61/52.86      (pred(Y!0) = pred(n4)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5043])).
% 52.61/52.86  tff(5047,plain,
% 52.61/52.86      (pred(Y!0) = n3),
% 52.61/52.86      inference(transitivity,[status(thm)],[5046, 166])).
% 52.61/52.86  tff(5048,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(Y!0)) = sum(n3, n5)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5047, 5045])).
% 52.61/52.86  tff(5049,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(Y!0)) = n8),
% 52.61/52.86      inference(transitivity,[status(thm)],[5048, 35])).
% 52.61/52.86  tff(5050,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[937, 1477])).
% 52.61/52.86  tff(5051,plain,
% 52.61/52.86      (sum(n12, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[5050])).
% 52.61/52.86  tff(5052,plain,
% 52.61/52.86      (n20 = sum(n12, n8)),
% 52.61/52.86      inference(symmetry,[status(thm)],[390])).
% 52.61/52.86  tff(5053,plain,
% 52.61/52.86      (sum(n3, n7) = n10),
% 52.61/52.86      inference(and_elim,[status(thm)],[9])).
% 52.61/52.86  tff(5054,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n3, n7)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1475, 933])).
% 52.61/52.86  tff(5055,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.86      inference(transitivity,[status(thm)],[5054, 5053])).
% 52.61/52.86  tff(5056,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n5, n5)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[935, 1473])).
% 52.61/52.86  tff(5057,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.86      inference(transitivity,[status(thm)],[5056, 313])).
% 52.61/52.86  tff(5058,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5057, 5055])).
% 52.61/52.86  tff(5059,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[5058, 1358, 5052, 5051])).
% 52.61/52.86  tff(5060,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 5059])).
% 52.61/52.86  tff(5061,plain,((~(X!1 = n6)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(5062,plain,
% 52.61/52.86      (~(X!1 = n6)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5061, 5043])).
% 52.61/52.86  tff(5063,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[46, 1477])).
% 52.61/52.86  tff(5064,plain,
% 52.61/52.86      (sum(n14, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[5063])).
% 52.61/52.86  tff(5065,plain,
% 52.61/52.86      (n1 = sum(n14, n8)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1121])).
% 52.61/52.86  tff(5066,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n3, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1475, 41])).
% 52.61/52.86  tff(5067,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.61/52.86      inference(transitivity,[status(thm)],[5066, 1150])).
% 52.61/52.86  tff(5068,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n6, n5)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[44, 1473])).
% 52.61/52.86  tff(5069,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.61/52.86      inference(transitivity,[status(thm)],[5068, 1147])).
% 52.61/52.86  tff(5070,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5069, 5067])).
% 52.61/52.86  tff(5071,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[5070, 438, 5065, 5064])).
% 52.61/52.86  tff(5072,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 5071])).
% 52.61/52.86  tff(5073,plain,((~(X!1 = n7)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(5074,plain,
% 52.61/52.86      (~(X!1 = n7)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5073, 5043])).
% 52.61/52.86  tff(5075,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[534, 1477])).
% 52.61/52.86  tff(5076,plain,
% 52.61/52.86      (sum(n16, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[5075])).
% 52.61/52.86  tff(5077,plain,
% 52.61/52.86      (n3 = sum(n16, n8)),
% 52.61/52.86      inference(symmetry,[status(thm)],[2216])).
% 52.61/52.86  tff(5078,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n3, n9)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[1475, 529])).
% 52.61/52.86  tff(5079,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.61/52.86      inference(transitivity,[status(thm)],[5078, 1905])).
% 52.61/52.86  tff(5080,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = sum(n7, n5)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[532, 1473])).
% 52.61/52.86  tff(5081,plain,
% 52.61/52.86      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.61/52.86      inference(transitivity,[status(thm)],[5080, 1902])).
% 52.61/52.86  tff(5082,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[5081, 5079])).
% 52.61/52.86  tff(5083,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(transitivity,[status(thm)],[5082, 123, 5077, 5076])).
% 52.61/52.86  tff(5084,plain,
% 52.61/52.86      ($false),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[60, 5083])).
% 52.61/52.86  tff(5085,plain,((~(X!1 = n8)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.86  tff(5086,plain,
% 52.61/52.86      (~(X!1 = n8)),
% 52.61/52.86      inference(unit_resolution,[status(thm)],[5085, 5043])).
% 52.61/52.86  tff(5087,plain,
% 52.61/52.86      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n8)),
% 52.61/52.86      inference(monotonicity,[status(thm)],[804, 1477])).
% 52.61/52.86  tff(5088,plain,
% 52.61/52.86      (sum(n18, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.86      inference(symmetry,[status(thm)],[5087])).
% 52.61/52.86  tff(5089,plain,
% 52.61/52.86      (n5 = sum(n18, n8)),
% 52.61/52.86      inference(symmetry,[status(thm)],[1535])).
% 52.61/52.86  tff(5090,plain,
% 52.61/52.86      (sum(pred(Y!0), succ(X!1)) = sum(n3, n10)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1475, 800])).
% 52.61/52.87  tff(5091,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.61/52.87      inference(transitivity,[status(thm)],[5090, 178])).
% 52.61/52.87  tff(5092,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n8, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[802, 1473])).
% 52.61/52.87  tff(5093,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.61/52.87      inference(transitivity,[status(thm)],[5092, 175])).
% 52.61/52.87  tff(5094,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5093, 5091])).
% 52.61/52.87  tff(5095,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5094, 51, 5089, 5088])).
% 52.61/52.87  tff(5096,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5095])).
% 52.61/52.87  tff(5097,plain,((~(X!1 = n9)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5098,plain,
% 52.61/52.87      (~(X!1 = n9)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5097, 5043])).
% 52.61/52.87  tff(5099,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[244, 1477])).
% 52.61/52.87  tff(5100,plain,
% 52.61/52.87      (sum(n20, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5099])).
% 52.61/52.87  tff(5101,plain,
% 52.61/52.87      (n7 = sum(n20, n8)),
% 52.61/52.87      inference(symmetry,[status(thm)],[498])).
% 52.61/52.87  tff(5102,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n3, n11)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1475, 239])).
% 52.61/52.87  tff(5103,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.61/52.87      inference(transitivity,[status(thm)],[5102, 4982])).
% 52.61/52.87  tff(5104,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n9, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[242, 1473])).
% 52.61/52.87  tff(5105,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.61/52.87      inference(transitivity,[status(thm)],[5104, 403])).
% 52.61/52.87  tff(5106,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5105, 5103])).
% 52.61/52.87  tff(5107,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5106, 192, 5101, 5100])).
% 52.61/52.87  tff(5108,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5107])).
% 52.61/52.87  tff(5109,plain,((~(X!1 = n10)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5110,plain,
% 52.61/52.87      (~(X!1 = n10)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5109, 5043])).
% 52.61/52.87  tff(5111,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[433, 1477])).
% 52.61/52.87  tff(5112,plain,
% 52.61/52.87      (sum(n1, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5111])).
% 52.61/52.87  tff(5113,plain,
% 52.61/52.87      (n9 = sum(n1, n8)),
% 52.61/52.87      inference(symmetry,[status(thm)],[1816])).
% 52.61/52.87  tff(5114,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n3, n12)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1475, 428])).
% 52.61/52.87  tff(5115,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.61/52.87      inference(transitivity,[status(thm)],[5114, 2813])).
% 52.61/52.87  tff(5116,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n10, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[431, 1473])).
% 52.61/52.87  tff(5117,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.61/52.87      inference(transitivity,[status(thm)],[5116, 372])).
% 52.61/52.87  tff(5118,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5117, 5115])).
% 52.61/52.87  tff(5119,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5118, 513, 5113, 5112])).
% 52.61/52.87  tff(5120,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5119])).
% 52.61/52.87  tff(5121,plain,((~(X!1 = n11)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5122,plain,
% 52.61/52.87      (~(X!1 = n11)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5121, 5043])).
% 52.61/52.87  tff(5123,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[340, 1477])).
% 52.61/52.87  tff(5124,plain,
% 52.61/52.87      (sum(n3, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5123])).
% 52.61/52.87  tff(5125,plain,
% 52.61/52.87      (n11 = sum(n3, n8)),
% 52.61/52.87      inference(symmetry,[status(thm)],[1150])).
% 52.61/52.87  tff(5126,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n3, n13)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1475, 335])).
% 52.61/52.87  tff(5127,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.61/52.87      inference(transitivity,[status(thm)],[5126, 4812])).
% 52.61/52.87  tff(5128,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n11, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[338, 1473])).
% 52.61/52.87  tff(5129,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.61/52.87      inference(transitivity,[status(thm)],[5128, 4382])).
% 52.61/52.87  tff(5130,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5129, 5127])).
% 52.61/52.87  tff(5131,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5130, 208, 5125, 5124])).
% 52.61/52.87  tff(5132,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5131])).
% 52.61/52.87  tff(5133,plain,((~(X!1 = n12)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5134,plain,
% 52.61/52.87      (~(X!1 = n12)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5133, 5043])).
% 52.61/52.87  tff(5135,plain,
% 52.61/52.87      (~(X!1 = n20)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[4120, 5043])).
% 52.61/52.87  tff(5136,plain,
% 52.61/52.87      (~(X!1 = n16)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[4526, 5043])).
% 52.61/52.87  tff(5137,plain,
% 52.61/52.87      ((~(X!1 = n19)) | (Y!0 = n18)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[4107, 4686])).
% 52.61/52.87  tff(5138,plain,
% 52.61/52.87      (~(X!1 = n19)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5137, 3701])).
% 52.61/52.87  tff(5139,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[187, 1477])).
% 52.61/52.87  tff(5140,plain,
% 52.61/52.87      (sum(n10, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5139])).
% 52.61/52.87  tff(5141,plain,
% 52.61/52.87      (n18 = sum(n10, n8)),
% 52.61/52.87      inference(symmetry,[status(thm)],[1106])).
% 52.61/52.87  tff(5142,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n3, n6)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1475, 101])).
% 52.61/52.87  tff(5143,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.87      inference(transitivity,[status(thm)],[5142, 2409])).
% 52.61/52.87  tff(5144,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n4, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[111, 1473])).
% 52.61/52.87  tff(5145,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.87      inference(transitivity,[status(thm)],[5144, 1720])).
% 52.61/52.87  tff(5146,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5145, 5143])).
% 52.61/52.87  tff(5147,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5146, 1315, 5141, 5140])).
% 52.61/52.87  tff(5148,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5147])).
% 52.61/52.87  tff(5149,plain,((~(X!1 = n5)) | (~(Y!0 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5150,plain,
% 52.61/52.87      (~(X!1 = n5)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5149, 5043])).
% 52.61/52.87  tff(5151,plain,
% 52.61/52.87      ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3) | (X!1 = n2)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[3648, 3686])).
% 52.61/52.87  tff(5152,plain,
% 52.61/52.87      ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (X!1 = n3)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5151, 4667])).
% 52.61/52.87  tff(5153,plain,
% 52.61/52.87      ((X!1 = n19) | (X!1 = n20) | (X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5152, 4717])).
% 52.61/52.87  tff(5154,plain,
% 52.61/52.87      (X!1 = n4),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5153, 5150, 24, 3906, 5138, 5136, 3697, 3696, 5135, 5134, 5122, 5110, 5098, 5086, 5074, 5062])).
% 52.61/52.87  tff(5155,plain,
% 52.61/52.87      (succ(X!1) = succ(n4)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5154])).
% 52.61/52.87  tff(5156,plain,
% 52.61/52.87      (succ(X!1) = n5),
% 52.61/52.87      inference(transitivity,[status(thm)],[5155, 36])).
% 52.61/52.87  tff(5157,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n3, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5047, 5156])).
% 52.61/52.87  tff(5158,plain,
% 52.61/52.87      (pred(n4) = pred(Y!0)),
% 52.61/52.87      inference(symmetry,[status(thm)],[5046])).
% 52.61/52.87  tff(5159,plain,
% 52.61/52.87      (pred(X!1) = pred(n4)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5154])).
% 52.61/52.87  tff(5160,plain,
% 52.61/52.87      (pred(X!1) = pred(Y!0)),
% 52.61/52.87      inference(transitivity,[status(thm)],[5159, 5158])).
% 52.61/52.87  tff(5161,plain,
% 52.61/52.87      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5160])).
% 52.61/52.87  tff(5162,plain,
% 52.61/52.87      (sum(pred(X!1), succ(X!1)) = n8),
% 52.61/52.87      inference(transitivity,[status(thm)],[5161, 5157, 35])).
% 52.61/52.87  tff(5163,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5162, 5049])).
% 52.61/52.87  tff(5164,plain,
% 52.61/52.87      (sum(n8, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5163])).
% 52.61/52.87  tff(5165,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.87      inference(transitivity,[status(thm)],[5157, 35])).
% 52.61/52.87  tff(5166,plain,
% 52.61/52.87      (pred(X!1) = n3),
% 52.61/52.87      inference(transitivity,[status(thm)],[5159, 166])).
% 52.61/52.87  tff(5167,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n3, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5166, 5045])).
% 52.61/52.87  tff(5168,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.87      inference(transitivity,[status(thm)],[5167, 35])).
% 52.61/52.87  tff(5169,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5168, 5165])).
% 52.61/52.87  tff(5170,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5169, 5164])).
% 52.61/52.87  tff(5171,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5170])).
% 52.61/52.87  tff(5172,plain,((Y!0 = n18) | (X!1 = n13) | (X!1 = n15) | (X!1 = n14) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n10) | (Y!0 = n12) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n7) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5173,plain,
% 52.61/52.87      (Y!0 = n18),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5172, 3697, 24, 3696, 4748, 4747, 5041, 5040, 4900, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.87  tff(5174,plain,
% 52.61/52.87      (succ(Y!0) = succ(n18)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5173])).
% 52.61/52.87  tff(5175,plain,
% 52.61/52.87      (succ(Y!0) = n19),
% 52.61/52.87      inference(transitivity,[status(thm)],[5174, 764])).
% 52.61/52.87  tff(5176,plain,
% 52.61/52.87      (pred(Y!0) = pred(n18)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5173])).
% 52.61/52.87  tff(5177,plain,
% 52.61/52.87      (pred(Y!0) = n17),
% 52.61/52.87      inference(transitivity,[status(thm)],[5176, 768])).
% 52.61/52.87  tff(5178,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(Y!0)) = sum(n17, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5177, 5175])).
% 52.61/52.87  tff(5179,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(Y!0)) = n15),
% 52.61/52.87      inference(transitivity,[status(thm)],[5178, 763])).
% 52.61/52.87  tff(5180,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[46, 1456])).
% 52.61/52.87  tff(5181,plain,
% 52.61/52.87      (sum(n14, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5180])).
% 52.61/52.87  tff(5182,plain,
% 52.61/52.87      (sum(n14, n15) = n8),
% 52.61/52.87      inference(and_elim,[status(thm)],[9])).
% 52.61/52.87  tff(5183,plain,
% 52.61/52.87      (n8 = sum(n14, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[5182])).
% 52.61/52.87  tff(5184,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 41])).
% 52.61/52.87  tff(5185,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.87      inference(transitivity,[status(thm)],[5184, 1212])).
% 52.61/52.87  tff(5186,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n6, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[44, 1452])).
% 52.61/52.87  tff(5187,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.87      inference(transitivity,[status(thm)],[5186, 1209])).
% 52.61/52.87  tff(5188,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5187, 5185])).
% 52.61/52.87  tff(5189,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5188, 264, 5183, 5181])).
% 52.61/52.87  tff(5190,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5189])).
% 52.61/52.87  tff(5191,plain,((~(X!1 = n7)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5192,plain,
% 52.61/52.87      (~(X!1 = n7)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5191, 5173])).
% 52.61/52.87  tff(5193,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[534, 1456])).
% 52.61/52.87  tff(5194,plain,
% 52.61/52.87      (sum(n16, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5193])).
% 52.61/52.87  tff(5195,plain,
% 52.61/52.87      (n10 = sum(n16, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[2202])).
% 52.61/52.87  tff(5196,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n9)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 529])).
% 52.61/52.87  tff(5197,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.87      inference(transitivity,[status(thm)],[5196, 3879])).
% 52.61/52.87  tff(5198,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n7, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[532, 1452])).
% 52.61/52.87  tff(5199,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.87      inference(transitivity,[status(thm)],[5198, 3458])).
% 52.61/52.87  tff(5200,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5199, 5197])).
% 52.61/52.87  tff(5201,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5200, 313, 5195, 5194])).
% 52.61/52.87  tff(5202,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5201])).
% 52.61/52.87  tff(5203,plain,((~(X!1 = n8)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5204,plain,
% 52.61/52.87      (~(X!1 = n8)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5203, 5173])).
% 52.61/52.87  tff(5205,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[804, 1456])).
% 52.61/52.87  tff(5206,plain,
% 52.61/52.87      (sum(n18, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5205])).
% 52.61/52.87  tff(5207,plain,
% 52.61/52.87      (n12 = sum(n18, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[1644])).
% 52.61/52.87  tff(5208,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n10)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 800])).
% 52.61/52.87  tff(5209,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.87      inference(transitivity,[status(thm)],[5208, 3759])).
% 52.61/52.87  tff(5210,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n8, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[802, 1452])).
% 52.61/52.87  tff(5211,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.87      inference(transitivity,[status(thm)],[5210, 3320])).
% 52.61/52.87  tff(5212,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5211, 5209])).
% 52.61/52.87  tff(5213,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5212, 127, 5207, 5206])).
% 52.61/52.87  tff(5214,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5213])).
% 52.61/52.87  tff(5215,plain,((~(X!1 = n9)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5216,plain,
% 52.61/52.87      (~(X!1 = n9)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5215, 5173])).
% 52.61/52.87  tff(5217,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[244, 1456])).
% 52.61/52.87  tff(5218,plain,
% 52.61/52.87      (sum(n20, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5217])).
% 52.61/52.87  tff(5219,plain,
% 52.61/52.87      (n14 = sum(n20, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[3204])).
% 52.61/52.87  tff(5220,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n11)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 239])).
% 52.61/52.87  tff(5221,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.61/52.87      inference(transitivity,[status(thm)],[5220, 3865])).
% 52.61/52.87  tff(5222,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n9, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[242, 1452])).
% 52.61/52.87  tff(5223,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.61/52.87      inference(transitivity,[status(thm)],[5222, 3472])).
% 52.61/52.87  tff(5224,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5223, 5221])).
% 52.61/52.87  tff(5225,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5224, 405, 5219, 5218])).
% 52.61/52.87  tff(5226,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5225])).
% 52.61/52.87  tff(5227,plain,((~(X!1 = n10)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5228,plain,
% 52.61/52.87      (~(X!1 = n10)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5227, 5173])).
% 52.61/52.87  tff(5229,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[433, 1456])).
% 52.61/52.87  tff(5230,plain,
% 52.61/52.87      (sum(n1, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5229])).
% 52.61/52.87  tff(5231,plain,
% 52.61/52.87      (n16 = sum(n1, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[920])).
% 52.61/52.87  tff(5232,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n12)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 428])).
% 52.61/52.87  tff(5233,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.87      inference(transitivity,[status(thm)],[5232, 3000])).
% 52.61/52.87  tff(5234,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n10, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[431, 1452])).
% 52.61/52.87  tff(5235,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.87      inference(transitivity,[status(thm)],[5234, 2997])).
% 52.61/52.87  tff(5236,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5235, 5233])).
% 52.61/52.87  tff(5237,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5236, 209, 5231, 5230])).
% 52.61/52.87  tff(5238,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5237])).
% 52.61/52.87  tff(5239,plain,((~(X!1 = n11)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5240,plain,
% 52.61/52.87      (~(X!1 = n11)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5239, 5173])).
% 52.61/52.87  tff(5241,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[340, 1456])).
% 52.61/52.87  tff(5242,plain,
% 52.61/52.87      (sum(n3, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5241])).
% 52.61/52.87  tff(5243,plain,
% 52.61/52.87      (sum(n3, n15) = n18),
% 52.61/52.87      inference(and_elim,[status(thm)],[9])).
% 52.61/52.87  tff(5244,plain,
% 52.61/52.87      (n18 = sum(n3, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[5243])).
% 52.61/52.87  tff(5245,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n13)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 335])).
% 52.61/52.87  tff(5246,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.87      inference(transitivity,[status(thm)],[5245, 3851])).
% 52.61/52.87  tff(5247,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n11, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[338, 1452])).
% 52.61/52.87  tff(5248,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.87      inference(transitivity,[status(thm)],[5247, 3501])).
% 52.61/52.87  tff(5249,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5248, 5246])).
% 52.61/52.87  tff(5250,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5249, 1315, 5244, 5242])).
% 52.61/52.87  tff(5251,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5250])).
% 52.61/52.87  tff(5252,plain,((~(X!1 = n12)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5253,plain,
% 52.61/52.87      (~(X!1 = n12)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5252, 5173])).
% 52.61/52.87  tff(5254,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[170, 1456])).
% 52.61/52.87  tff(5255,plain,
% 52.61/52.87      (sum(n8, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5254])).
% 52.61/52.87  tff(5256,plain,
% 52.61/52.87      (sum(n8, n15) = n2),
% 52.61/52.87      inference(and_elim,[status(thm)],[9])).
% 52.61/52.87  tff(5257,plain,
% 52.61/52.87      (n2 = sum(n8, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[5256])).
% 52.61/52.87  tff(5258,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 165])).
% 52.61/52.87  tff(5259,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.87      inference(transitivity,[status(thm)],[5258, 3707])).
% 52.61/52.87  tff(5260,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n3, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[168, 1452])).
% 52.61/52.87  tff(5261,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.87      inference(transitivity,[status(thm)],[5260, 3429])).
% 52.61/52.87  tff(5262,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5261, 5259])).
% 52.61/52.87  tff(5263,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5262, 599, 5257, 5255])).
% 52.61/52.87  tff(5264,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5263])).
% 52.61/52.87  tff(5265,plain,((~(X!1 = n4)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5266,plain,
% 52.61/52.87      (~(X!1 = n4)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5265, 5173])).
% 52.61/52.87  tff(5267,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[937, 1456])).
% 52.61/52.87  tff(5268,plain,
% 52.61/52.87      (sum(n12, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5267])).
% 52.61/52.87  tff(5269,plain,
% 52.61/52.87      (sum(n12, n15) = n6),
% 52.61/52.87      inference(and_elim,[status(thm)],[9])).
% 52.61/52.87  tff(5270,plain,
% 52.61/52.87      (n6 = sum(n12, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[5269])).
% 52.61/52.87  tff(5271,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n7)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1454, 933])).
% 52.61/52.87  tff(5272,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.87      inference(transitivity,[status(thm)],[5271, 3785])).
% 52.61/52.87  tff(5273,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n5, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[935, 1452])).
% 52.61/52.87  tff(5274,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.87      inference(transitivity,[status(thm)],[5273, 3444])).
% 52.61/52.87  tff(5275,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5274, 5272])).
% 52.61/52.87  tff(5276,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5275, 224, 5270, 5268])).
% 52.61/52.87  tff(5277,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5276])).
% 52.61/52.87  tff(5278,plain,((~(X!1 = n6)) | (~(Y!0 = n18))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5279,plain,
% 52.61/52.87      (~(X!1 = n6)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5278, 5173])).
% 52.61/52.87  tff(5280,plain,
% 52.61/52.87      ((X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[4668, 4717])).
% 52.61/52.87  tff(5281,plain,
% 52.61/52.87      (X!1 = n5),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5280, 5279, 24, 3696, 3697, 5266, 5253, 5240, 5228, 5216, 5204, 5192])).
% 52.61/52.87  tff(5282,plain,
% 52.61/52.87      (succ(X!1) = succ(n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5281])).
% 52.61/52.87  tff(5283,plain,
% 52.61/52.87      (succ(X!1) = n6),
% 52.61/52.87      inference(transitivity,[status(thm)],[5282, 88])).
% 52.61/52.87  tff(5284,plain,
% 52.61/52.87      (pred(X!1) = pred(n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5281])).
% 52.61/52.87  tff(5285,plain,
% 52.61/52.87      (pred(X!1) = n4),
% 52.61/52.87      inference(transitivity,[status(thm)],[5284, 92])).
% 52.61/52.87  tff(5286,plain,
% 52.61/52.87      (sum(pred(X!1), succ(X!1)) = sum(n4, n6)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5285, 5283])).
% 52.61/52.87  tff(5287,plain,
% 52.61/52.87      (sum(pred(X!1), succ(X!1)) = n10),
% 52.61/52.87      inference(transitivity,[status(thm)],[5286, 87])).
% 52.61/52.87  tff(5288,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5287, 5179])).
% 52.61/52.87  tff(5289,plain,
% 52.61/52.87      (sum(n10, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5288])).
% 52.61/52.87  tff(5290,plain,
% 52.61/52.87      (n4 = sum(n10, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[2944])).
% 52.61/52.87  tff(5291,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n6)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5177, 5283])).
% 52.61/52.87  tff(5292,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.87      inference(transitivity,[status(thm)],[5291, 2530])).
% 52.61/52.87  tff(5293,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n4, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5285, 5175])).
% 52.61/52.87  tff(5294,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.87      inference(transitivity,[status(thm)],[5293, 3294])).
% 52.61/52.87  tff(5295,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5294, 5292])).
% 52.61/52.87  tff(5296,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5295, 583, 5290, 5289])).
% 52.61/52.87  tff(5297,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5296])).
% 52.61/52.87  tff(5298,plain,((X!1 = n15) | (X!1 = n13) | (X!1 = n14) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n10) | (Y!0 = n12) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n7) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5299,plain,
% 52.61/52.87      (X!1 = n15),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5298, 5041, 3696, 4748, 4747, 24, 5040, 4900, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.87  tff(5300,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n8)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[70, 1477])).
% 52.61/52.87  tff(5301,plain,
% 52.61/52.87      (sum(n9, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5300])).
% 52.61/52.87  tff(5302,plain,
% 52.61/52.87      (n17 = sum(n9, n8)),
% 52.61/52.87      inference(symmetry,[status(thm)],[1091])).
% 52.61/52.87  tff(5303,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n3, n16)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1475, 66])).
% 52.61/52.87  tff(5304,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.87      inference(transitivity,[status(thm)],[5303, 2006])).
% 52.61/52.87  tff(5305,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n14, n5)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[68, 1473])).
% 52.61/52.87  tff(5306,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.87      inference(transitivity,[status(thm)],[5305, 388])).
% 52.61/52.87  tff(5307,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5306, 5304])).
% 52.61/52.87  tff(5308,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5307, 776, 5302, 5301])).
% 52.61/52.87  tff(5309,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5308])).
% 52.61/52.87  tff(5310,plain,((~(Y!0 = n4)) | (~(X!1 = n15))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5311,plain,
% 52.61/52.87      (~(Y!0 = n4)),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5310, 5299])).
% 52.61/52.87  tff(5312,plain,
% 52.61/52.87      (Y!0 = n18),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5042, 5311, 4748, 4747, 5041, 5040, 4900, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.87  tff(5313,plain,
% 52.61/52.87      (succ(Y!0) = succ(n18)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5312])).
% 52.61/52.87  tff(5314,plain,
% 52.61/52.87      (succ(Y!0) = n19),
% 52.61/52.87      inference(transitivity,[status(thm)],[5313, 764])).
% 52.61/52.87  tff(5315,plain,
% 52.61/52.87      (pred(Y!0) = pred(n18)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5312])).
% 52.61/52.87  tff(5316,plain,
% 52.61/52.87      (pred(Y!0) = n17),
% 52.61/52.87      inference(transitivity,[status(thm)],[5315, 768])).
% 52.61/52.87  tff(5317,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(Y!0)) = sum(n17, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5316, 5314])).
% 52.61/52.87  tff(5318,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(Y!0)) = n15),
% 52.61/52.87      inference(transitivity,[status(thm)],[5317, 763])).
% 52.61/52.87  tff(5319,plain,
% 52.61/52.87      (succ(X!1) = succ(n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5299])).
% 52.61/52.87  tff(5320,plain,
% 52.61/52.87      (succ(X!1) = n16),
% 52.61/52.87      inference(transitivity,[status(thm)],[5319, 13])).
% 52.61/52.87  tff(5321,plain,
% 52.61/52.87      (pred(X!1) = pred(n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5299])).
% 52.61/52.87  tff(5322,plain,
% 52.61/52.87      (pred(X!1) = n14),
% 52.61/52.87      inference(transitivity,[status(thm)],[5321, 17])).
% 52.61/52.87  tff(5323,plain,
% 52.61/52.87      (sum(pred(X!1), succ(X!1)) = sum(n14, n16)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5322, 5320])).
% 52.61/52.87  tff(5324,plain,
% 52.61/52.87      (sum(pred(X!1), succ(X!1)) = n9),
% 52.61/52.87      inference(transitivity,[status(thm)],[5323, 12])).
% 52.61/52.87  tff(5325,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n15)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5324, 5318])).
% 52.61/52.87  tff(5326,plain,
% 52.61/52.87      (sum(n9, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5325])).
% 52.61/52.87  tff(5327,plain,
% 52.61/52.87      (n3 = sum(n9, n15)),
% 52.61/52.87      inference(symmetry,[status(thm)],[291])).
% 52.61/52.87  tff(5328,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n17, n16)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5316, 5320])).
% 52.61/52.87  tff(5329,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n12),
% 52.61/52.87      inference(transitivity,[status(thm)],[5328, 3798])).
% 52.61/52.87  tff(5330,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n14, n19)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5322, 5314])).
% 52.61/52.87  tff(5331,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n12),
% 52.61/52.87      inference(transitivity,[status(thm)],[5330, 3361])).
% 52.61/52.87  tff(5332,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n12, n12)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5331, 5329])).
% 52.61/52.87  tff(5333,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(transitivity,[status(thm)],[5332, 123, 5327, 5326])).
% 52.61/52.87  tff(5334,plain,
% 52.61/52.87      ($false),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[60, 5333])).
% 52.61/52.87  tff(5335,plain,((Y!0 = n10) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n12) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n7) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0) | (X!1 = n14) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.87  tff(5336,plain,
% 52.61/52.87      (Y!0 = n12),
% 52.61/52.87      inference(unit_resolution,[status(thm)],[5335, 5039, 4747, 4748, 4900, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739, 3696, 24])).
% 52.61/52.87  tff(5337,plain,
% 52.61/52.87      (succ(Y!0) = succ(n12)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5336])).
% 52.61/52.87  tff(5338,plain,
% 52.61/52.87      (succ(Y!0) = n13),
% 52.61/52.87      inference(transitivity,[status(thm)],[5337, 98])).
% 52.61/52.87  tff(5339,plain,
% 52.61/52.87      (pred(Y!0) = pred(n12)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5336])).
% 52.61/52.87  tff(5340,plain,
% 52.61/52.87      (pred(Y!0) = n11),
% 52.61/52.87      inference(transitivity,[status(thm)],[5339, 336])).
% 52.61/52.87  tff(5341,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(Y!0)) = sum(n11, n13)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5340, 5338])).
% 52.61/52.87  tff(5342,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(Y!0)) = n3),
% 52.61/52.87      inference(transitivity,[status(thm)],[5341, 97])).
% 52.61/52.87  tff(5343,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n3)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[534, 1413])).
% 52.61/52.87  tff(5344,plain,
% 52.61/52.87      (sum(n16, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.87      inference(symmetry,[status(thm)],[5343])).
% 52.61/52.87  tff(5345,plain,
% 52.61/52.87      (n19 = sum(n16, n3)),
% 52.61/52.87      inference(symmetry,[status(thm)],[1842])).
% 52.61/52.87  tff(5346,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = sum(n11, n9)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[1411, 529])).
% 52.61/52.87  tff(5347,plain,
% 52.61/52.87      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.87      inference(transitivity,[status(thm)],[5346, 2011])).
% 52.61/52.87  tff(5348,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = sum(n7, n13)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[532, 1409])).
% 52.61/52.87  tff(5349,plain,
% 52.61/52.87      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.87      inference(transitivity,[status(thm)],[5348, 2008])).
% 52.61/52.87  tff(5350,plain,
% 52.61/52.87      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.87      inference(monotonicity,[status(thm)],[5349, 5347])).
% 52.61/52.88  tff(5351,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5350, 139, 5345, 5344])).
% 52.61/52.88  tff(5352,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5351])).
% 52.61/52.88  tff(5353,plain,((~(X!1 = n8)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5354,plain,
% 52.61/52.88      (~(X!1 = n8)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5353, 5336])).
% 52.61/52.88  tff(5355,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[804, 1413])).
% 52.61/52.88  tff(5356,plain,
% 52.61/52.88      (sum(n18, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5355])).
% 52.61/52.88  tff(5357,plain,
% 52.61/52.88      (n0 = sum(n18, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1800])).
% 52.61/52.88  tff(5358,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n10)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 800])).
% 52.61/52.88  tff(5359,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.88      inference(transitivity,[status(thm)],[5358, 4407])).
% 52.61/52.88  tff(5360,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n8, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[802, 1409])).
% 52.61/52.88  tff(5361,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.88      inference(transitivity,[status(thm)],[5360, 4825])).
% 52.61/52.88  tff(5362,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5361, 5359])).
% 52.61/52.88  tff(5363,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5362, 75, 5357, 5356])).
% 52.61/52.88  tff(5364,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5363])).
% 52.61/52.88  tff(5365,plain,((~(X!1 = n9)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5366,plain,
% 52.61/52.88      (~(X!1 = n9)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5365, 5336])).
% 52.61/52.88  tff(5367,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[244, 1413])).
% 52.61/52.88  tff(5368,plain,
% 52.61/52.88      (sum(n20, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5367])).
% 52.61/52.88  tff(5369,plain,
% 52.61/52.88      (n2 = sum(n20, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1708])).
% 52.61/52.88  tff(5370,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 239])).
% 52.61/52.88  tff(5371,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.88      inference(transitivity,[status(thm)],[5370, 438])).
% 52.61/52.88  tff(5372,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n9, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[242, 1409])).
% 52.61/52.88  tff(5373,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.88      inference(transitivity,[status(thm)],[5372, 4799])).
% 52.61/52.88  tff(5374,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5373, 5371])).
% 52.61/52.88  tff(5375,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5374, 599, 5369, 5368])).
% 52.61/52.88  tff(5376,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5375])).
% 52.61/52.88  tff(5377,plain,((~(X!1 = n10)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5378,plain,
% 52.61/52.88      (~(X!1 = n10)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5377, 5336])).
% 52.61/52.88  tff(5379,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[433, 1413])).
% 52.61/52.88  tff(5380,plain,
% 52.61/52.88      (sum(n1, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5379])).
% 52.61/52.88  tff(5381,plain,
% 52.61/52.88      (n4 = sum(n1, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[788])).
% 52.61/52.88  tff(5382,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n12)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 428])).
% 52.61/52.88  tff(5383,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.88      inference(transitivity,[status(thm)],[5382, 2920])).
% 52.61/52.88  tff(5384,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n10, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[431, 1409])).
% 52.61/52.88  tff(5385,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.88      inference(transitivity,[status(thm)],[5384, 2917])).
% 52.61/52.88  tff(5386,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5385, 5383])).
% 52.61/52.88  tff(5387,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5386, 583, 5381, 5380])).
% 52.61/52.88  tff(5388,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5387])).
% 52.61/52.88  tff(5389,plain,((~(X!1 = n11)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5390,plain,
% 52.61/52.88      (~(X!1 = n11)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5389, 5336])).
% 52.61/52.88  tff(5391,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[70, 1413])).
% 52.61/52.88  tff(5392,plain,
% 52.61/52.88      (sum(n9, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5391])).
% 52.61/52.88  tff(5393,plain,
% 52.61/52.88      (n12 = sum(n9, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[827])).
% 52.61/52.88  tff(5394,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n16)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 66])).
% 52.61/52.88  tff(5395,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.88      inference(transitivity,[status(thm)],[5394, 4543])).
% 52.61/52.88  tff(5396,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n14, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[68, 1409])).
% 52.61/52.88  tff(5397,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.88      inference(transitivity,[status(thm)],[5396, 4869])).
% 52.61/52.88  tff(5398,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5397, 5395])).
% 52.61/52.88  tff(5399,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5398, 127, 5393, 5392])).
% 52.61/52.88  tff(5400,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5399])).
% 52.61/52.88  tff(5401,plain,((~(X!1 = n15)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5402,plain,
% 52.61/52.88      (~(X!1 = n15)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5401, 5336])).
% 52.61/52.88  tff(5403,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 335])).
% 52.61/52.88  tff(5404,plain,
% 52.61/52.88      (pred(n12) = pred(Y!0)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1410])).
% 52.61/52.88  tff(5405,plain,
% 52.61/52.88      (pred(X!1) = pred(Y!0)),
% 52.61/52.88      inference(transitivity,[status(thm)],[337, 5404])).
% 52.61/52.88  tff(5406,plain,
% 52.61/52.88      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5405])).
% 52.61/52.88  tff(5407,plain,
% 52.61/52.88      (sum(pred(X!1), succ(X!1)) = n3),
% 52.61/52.88      inference(transitivity,[status(thm)],[5406, 5403, 97])).
% 52.61/52.88  tff(5408,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5407, 1413])).
% 52.61/52.88  tff(5409,plain,
% 52.61/52.88      (sum(n3, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5408])).
% 52.61/52.88  tff(5410,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.88      inference(transitivity,[status(thm)],[5403, 97])).
% 52.61/52.88  tff(5411,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n11, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[338, 1409])).
% 52.61/52.88  tff(5412,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.88      inference(transitivity,[status(thm)],[5411, 97])).
% 52.61/52.88  tff(5413,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5412, 5410])).
% 52.61/52.88  tff(5414,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5413, 5409])).
% 52.61/52.88  tff(5415,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5414])).
% 52.61/52.88  tff(5416,plain,((~(X!1 = n12)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5417,plain,
% 52.61/52.88      (~(X!1 = n12)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5416, 5336])).
% 52.61/52.88  tff(5418,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[170, 1413])).
% 52.61/52.88  tff(5419,plain,
% 52.61/52.88      (sum(n8, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5418])).
% 52.61/52.88  tff(5420,plain,
% 52.61/52.88      (n11 = sum(n8, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[812])).
% 52.61/52.88  tff(5421,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n5)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 165])).
% 52.61/52.88  tff(5422,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.61/52.88      inference(transitivity,[status(thm)],[5421, 4382])).
% 52.61/52.88  tff(5423,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n3, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[168, 1409])).
% 52.61/52.88  tff(5424,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.61/52.88      inference(transitivity,[status(thm)],[5423, 4812])).
% 52.61/52.88  tff(5425,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5424, 5422])).
% 52.61/52.88  tff(5426,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5425, 208, 5420, 5419])).
% 52.61/52.88  tff(5427,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5426])).
% 52.61/52.88  tff(5428,plain,((~(X!1 = n4)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5429,plain,
% 52.61/52.88      (~(X!1 = n4)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5428, 5336])).
% 52.61/52.88  tff(5430,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[187, 1413])).
% 52.61/52.88  tff(5431,plain,
% 52.61/52.88      (sum(n10, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5430])).
% 52.61/52.88  tff(5432,plain,
% 52.61/52.88      (n13 = sum(n10, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[842])).
% 52.61/52.88  tff(5433,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n6)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 101])).
% 52.61/52.88  tff(5434,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.61/52.88      inference(transitivity,[status(thm)],[5433, 2472])).
% 52.61/52.88  tff(5435,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n4, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[111, 1409])).
% 52.61/52.88  tff(5436,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.61/52.88      inference(transitivity,[status(thm)],[5435, 1840])).
% 52.61/52.88  tff(5437,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5436, 5434])).
% 52.61/52.88  tff(5438,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5437, 358, 5432, 5431])).
% 52.61/52.88  tff(5439,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5438])).
% 52.61/52.88  tff(5440,plain,((~(X!1 = n5)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5441,plain,
% 52.61/52.88      (~(X!1 = n5)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5440, 5336])).
% 52.61/52.88  tff(5442,plain,
% 52.61/52.88      (~(X!1 = n16)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[4502, 5336])).
% 52.61/52.88  tff(5443,plain,
% 52.61/52.88      ((Y!0 = n18) <=> (n12 = n18)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5336])).
% 52.61/52.88  tff(5444,plain,
% 52.61/52.88      ((n12 = n18) <=> (Y!0 = n18)),
% 52.61/52.88      inference(symmetry,[status(thm)],[5443])).
% 52.61/52.88  tff(5445,plain,
% 52.61/52.88      ((~(n12 = n18)) <=> (~(Y!0 = n18))),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5444])).
% 52.61/52.88  tff(5446,plain,
% 52.61/52.88      (~(n12 = n18)),
% 52.61/52.88      inference(and_elim,[status(thm)],[9])).
% 52.61/52.88  tff(5447,plain,
% 52.61/52.88      (~(Y!0 = n18)),
% 52.61/52.88      inference(modus_ponens,[status(thm)],[5446, 5445])).
% 52.61/52.88  tff(5448,plain,
% 52.61/52.88      (~(X!1 = n19)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5137, 5447])).
% 52.61/52.88  tff(5449,plain,
% 52.61/52.88      (~(X!1 = n20)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[4276, 5336])).
% 52.61/52.88  tff(5450,plain,
% 52.61/52.88      (~(X!1 = n18)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[3857, 5336])).
% 52.61/52.88  tff(5451,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[46, 1413])).
% 52.61/52.88  tff(5452,plain,
% 52.61/52.88      (sum(n14, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5451])).
% 52.61/52.88  tff(5453,plain,
% 52.61/52.88      (n17 = sum(n14, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[872])).
% 52.61/52.88  tff(5454,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n8)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1411, 41])).
% 52.61/52.88  tff(5455,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.88      inference(transitivity,[status(thm)],[5454, 1135])).
% 52.61/52.88  tff(5456,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n6, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[44, 1409])).
% 52.61/52.88  tff(5457,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.88      inference(transitivity,[status(thm)],[5456, 1132])).
% 52.61/52.88  tff(5458,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5457, 5455])).
% 52.61/52.88  tff(5459,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5458, 776, 5453, 5452])).
% 52.61/52.88  tff(5460,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5459])).
% 52.61/52.88  tff(5461,plain,((~(X!1 = n7)) | (~(Y!0 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5462,plain,
% 52.61/52.88      (~(X!1 = n7)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5461, 5336])).
% 52.61/52.88  tff(5463,plain,
% 52.61/52.88      (X!1 = n6),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5153, 5462, 24, 5450, 5449, 5448, 5442, 3696, 5441, 5429, 5417, 5402, 5390, 5378, 5366, 5354])).
% 52.61/52.88  tff(5464,plain,
% 52.61/52.88      (succ(X!1) = succ(n6)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5463])).
% 52.61/52.88  tff(5465,plain,
% 52.61/52.88      (succ(X!1) = n7),
% 52.61/52.88      inference(transitivity,[status(thm)],[5464, 26])).
% 52.61/52.88  tff(5466,plain,
% 52.61/52.88      (pred(X!1) = pred(n6)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5463])).
% 52.61/52.88  tff(5467,plain,
% 52.61/52.88      (pred(X!1) = n5),
% 52.61/52.88      inference(transitivity,[status(thm)],[5466, 30])).
% 52.61/52.88  tff(5468,plain,
% 52.61/52.88      (sum(pred(X!1), succ(X!1)) = sum(n5, n7)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5467, 5465])).
% 52.61/52.88  tff(5469,plain,
% 52.61/52.88      (sum(pred(X!1), succ(X!1)) = n12),
% 52.61/52.88      inference(transitivity,[status(thm)],[5468, 25])).
% 52.61/52.88  tff(5470,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5469, 5342])).
% 52.61/52.88  tff(5471,plain,
% 52.61/52.88      (sum(n12, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5470])).
% 52.61/52.88  tff(5472,plain,
% 52.61/52.88      (n15 = sum(n12, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1722])).
% 52.61/52.88  tff(5473,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n7)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5340, 5465])).
% 52.61/52.88  tff(5474,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.61/52.88      inference(transitivity,[status(thm)],[5473, 4457])).
% 52.61/52.88  tff(5475,plain,
% 52.61/52.88      (sum(n5, n13) = n18),
% 52.61/52.88      inference(and_elim,[status(thm)],[9])).
% 52.61/52.88  tff(5476,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n5, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5467, 5338])).
% 52.61/52.88  tff(5477,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.61/52.88      inference(transitivity,[status(thm)],[5476, 5475])).
% 52.61/52.88  tff(5478,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5477, 5474])).
% 52.61/52.88  tff(5479,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5478, 374, 5472, 5471])).
% 52.61/52.88  tff(5480,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5479])).
% 52.61/52.88  tff(5481,plain,((X!1 = n14) | (X!1 = n13) | (Y!0 = n1) | (Y!0 = n2) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n7) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5482,plain,
% 52.61/52.88      (X!1 = n14),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5481, 4900, 4747, 4748, 24, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.88  tff(5483,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n15)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[915, 1456])).
% 52.61/52.88  tff(5484,plain,
% 52.61/52.88      (sum(n7, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5483])).
% 52.61/52.88  tff(5485,plain,
% 52.61/52.88      (n1 = sum(n7, n15)),
% 52.61/52.88      inference(symmetry,[status(thm)],[603])).
% 52.61/52.88  tff(5486,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n17, n15)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1454, 911])).
% 52.61/52.88  tff(5487,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.61/52.88      inference(transitivity,[status(thm)],[5486, 3812])).
% 52.61/52.88  tff(5488,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n13, n19)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[913, 1452])).
% 52.61/52.88  tff(5489,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.61/52.88      inference(transitivity,[status(thm)],[5488, 3486])).
% 52.61/52.88  tff(5490,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5489, 5487])).
% 52.61/52.88  tff(5491,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5490, 438, 5485, 5484])).
% 52.61/52.88  tff(5492,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5491])).
% 52.61/52.88  tff(5493,plain,((~(Y!0 = n18)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5494,plain,
% 52.61/52.88      (~(Y!0 = n18)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5493, 5482])).
% 52.61/52.88  tff(5495,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n8)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[915, 1477])).
% 52.61/52.88  tff(5496,plain,
% 52.61/52.88      (sum(n7, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5495])).
% 52.61/52.88  tff(5497,plain,
% 52.61/52.88      (n15 = sum(n7, n8)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1063])).
% 52.61/52.88  tff(5498,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n3, n15)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1475, 911])).
% 52.61/52.88  tff(5499,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.61/52.88      inference(transitivity,[status(thm)],[5498, 5243])).
% 52.61/52.88  tff(5500,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n13, n5)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[913, 1473])).
% 52.61/52.88  tff(5501,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.61/52.88      inference(transitivity,[status(thm)],[5500, 2119])).
% 52.61/52.88  tff(5502,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5501, 5499])).
% 52.61/52.88  tff(5503,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5502, 374, 5497, 5496])).
% 52.61/52.88  tff(5504,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5503])).
% 52.61/52.88  tff(5505,plain,((~(Y!0 = n4)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5506,plain,
% 52.61/52.88      (~(Y!0 = n4)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5505, 5482])).
% 52.61/52.88  tff(5507,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n20)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[915, 1435])).
% 52.61/52.88  tff(5508,plain,
% 52.61/52.88      (sum(n7, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5507])).
% 52.61/52.88  tff(5509,plain,
% 52.61/52.88      (n6 = sum(n7, n20)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1552])).
% 52.61/52.88  tff(5510,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n9, n15)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[1433, 911])).
% 52.61/52.88  tff(5511,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.88      inference(transitivity,[status(thm)],[5510, 291])).
% 52.61/52.88  tff(5512,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n13, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[913, 1431])).
% 52.61/52.88  tff(5513,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.88      inference(transitivity,[status(thm)],[5512, 288])).
% 52.61/52.88  tff(5514,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5513, 5511])).
% 52.61/52.88  tff(5515,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5514, 224, 5509, 5508])).
% 52.61/52.88  tff(5516,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5515])).
% 52.61/52.88  tff(5517,plain,((~(Y!0 = n10)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5518,plain,
% 52.61/52.88      (~(Y!0 = n10)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5517, 5482])).
% 52.61/52.88  tff(5519,plain,
% 52.61/52.88      (Y!0 = n12),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5042, 5518, 4748, 4747, 5506, 5494, 4900, 4899, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.88  tff(5520,plain,
% 52.61/52.88      (succ(Y!0) = succ(n12)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5519])).
% 52.61/52.88  tff(5521,plain,
% 52.61/52.88      (succ(Y!0) = n13),
% 52.61/52.88      inference(transitivity,[status(thm)],[5520, 98])).
% 52.61/52.88  tff(5522,plain,
% 52.61/52.88      (pred(Y!0) = pred(n12)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5519])).
% 52.61/52.88  tff(5523,plain,
% 52.61/52.88      (pred(Y!0) = n11),
% 52.61/52.88      inference(transitivity,[status(thm)],[5522, 336])).
% 52.61/52.88  tff(5524,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(Y!0)) = sum(n11, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5523, 5521])).
% 52.61/52.88  tff(5525,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(Y!0)) = n3),
% 52.61/52.88      inference(transitivity,[status(thm)],[5524, 97])).
% 52.61/52.88  tff(5526,plain,
% 52.61/52.88      (succ(X!1) = succ(n14)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5482])).
% 52.61/52.88  tff(5527,plain,
% 52.61/52.88      (succ(X!1) = n15),
% 52.61/52.88      inference(transitivity,[status(thm)],[5526, 11])).
% 52.61/52.88  tff(5528,plain,
% 52.61/52.88      (pred(X!1) = pred(n14)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5482])).
% 52.61/52.88  tff(5529,plain,
% 52.61/52.88      (pred(X!1) = n13),
% 52.61/52.88      inference(transitivity,[status(thm)],[5528, 279])).
% 52.61/52.88  tff(5530,plain,
% 52.61/52.88      (sum(pred(X!1), succ(X!1)) = sum(n13, n15)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5529, 5527])).
% 52.61/52.88  tff(5531,plain,
% 52.61/52.88      (sum(pred(X!1), succ(X!1)) = n7),
% 52.61/52.88      inference(transitivity,[status(thm)],[5530, 10])).
% 52.61/52.88  tff(5532,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n3)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5531, 5525])).
% 52.61/52.88  tff(5533,plain,
% 52.61/52.88      (sum(n7, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5532])).
% 52.61/52.88  tff(5534,plain,
% 52.61/52.88      (n10 = sum(n7, n3)),
% 52.61/52.88      inference(symmetry,[status(thm)],[4629])).
% 52.61/52.88  tff(5535,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n11, n15)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5523, 5527])).
% 52.61/52.88  tff(5536,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.88      inference(transitivity,[status(thm)],[5535, 4608])).
% 52.61/52.88  tff(5537,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n13, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5529, 5521])).
% 52.61/52.88  tff(5538,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.88      inference(transitivity,[status(thm)],[5537, 51])).
% 52.61/52.88  tff(5539,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5538, 5536])).
% 52.61/52.88  tff(5540,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5539, 313, 5534, 5533])).
% 52.61/52.88  tff(5541,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5540])).
% 52.61/52.88  tff(5542,plain,((Y!0 = n17) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n16) | (Y!0 = n7) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5543,plain,
% 52.61/52.88      (Y!0 = n16),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5542, 4898, 4747, 4748, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739, 24])).
% 52.61/52.88  tff(5544,plain,
% 52.61/52.88      (succ(Y!0) = succ(n16)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5543])).
% 52.61/52.88  tff(5545,plain,
% 52.61/52.88      (succ(Y!0) = n17),
% 52.61/52.88      inference(transitivity,[status(thm)],[5544, 300])).
% 52.61/52.88  tff(5546,plain,
% 52.61/52.88      (pred(Y!0) = pred(n16)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5543])).
% 52.61/52.88  tff(5547,plain,
% 52.61/52.88      (pred(Y!0) = n15),
% 52.61/52.88      inference(transitivity,[status(thm)],[5546, 304])).
% 52.61/52.88  tff(5548,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(Y!0)) = sum(n15, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5547, 5545])).
% 52.61/52.88  tff(5549,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(Y!0)) = n11),
% 52.61/52.88      inference(transitivity,[status(thm)],[5548, 299])).
% 52.61/52.88  tff(5550,plain,
% 52.61/52.88      (~(X!1 = n8)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[624, 5543])).
% 52.61/52.88  tff(5551,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[804, 308])).
% 52.61/52.88  tff(5552,plain,
% 52.61/52.88      (sum(n18, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5551])).
% 52.61/52.88  tff(5553,plain,
% 52.61/52.88      (n8 = sum(n18, n11)),
% 52.61/52.88      inference(symmetry,[status(thm)],[1579])).
% 52.61/52.88  tff(5554,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n15, n10)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[306, 800])).
% 52.61/52.88  tff(5555,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.88      inference(transitivity,[status(thm)],[5554, 3769])).
% 52.61/52.88  tff(5556,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n8, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[802, 303])).
% 52.61/52.88  tff(5557,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.88      inference(transitivity,[status(thm)],[5556, 1671])).
% 52.61/52.88  tff(5558,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5557, 5555])).
% 52.61/52.88  tff(5559,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5558, 264, 5553, 5552])).
% 52.61/52.88  tff(5560,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5559])).
% 52.61/52.88  tff(5561,plain,((~(X!1 = n9)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5562,plain,
% 52.61/52.88      (~(X!1 = n9)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5561, 5543])).
% 52.61/52.88  tff(5563,plain,
% 52.61/52.88      (~(X!1 = n10)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[323, 5543])).
% 52.61/52.88  tff(5564,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[433, 308])).
% 52.61/52.88  tff(5565,plain,
% 52.61/52.88      (sum(n1, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5564])).
% 52.61/52.88  tff(5566,plain,
% 52.61/52.88      (n12 = sum(n1, n11)),
% 52.61/52.88      inference(symmetry,[status(thm)],[824])).
% 52.61/52.88  tff(5567,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n15, n12)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[306, 428])).
% 52.61/52.88  tff(5568,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.88      inference(transitivity,[status(thm)],[5567, 2985])).
% 52.61/52.88  tff(5569,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n10, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[431, 303])).
% 52.61/52.88  tff(5570,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.88      inference(transitivity,[status(thm)],[5569, 1503])).
% 52.61/52.88  tff(5571,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5570, 5568])).
% 52.61/52.88  tff(5572,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5571, 127, 5566, 5565])).
% 52.61/52.88  tff(5573,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5572])).
% 52.61/52.88  tff(5574,plain,((~(X!1 = n11)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5575,plain,
% 52.61/52.88      (~(X!1 = n11)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5574, 5543])).
% 52.61/52.88  tff(5576,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[70, 308])).
% 52.61/52.88  tff(5577,plain,
% 52.61/52.88      (sum(n9, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5576])).
% 52.61/52.88  tff(5578,plain,
% 52.61/52.88      (n20 = sum(n9, n11)),
% 52.61/52.88      inference(symmetry,[status(thm)],[236])).
% 52.61/52.88  tff(5579,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n15, n16)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[306, 66])).
% 52.61/52.88  tff(5580,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.88      inference(transitivity,[status(thm)],[5579, 3875])).
% 52.61/52.88  tff(5581,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n14, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[68, 303])).
% 52.61/52.88  tff(5582,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.88      inference(transitivity,[status(thm)],[5581, 1533])).
% 52.61/52.88  tff(5583,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5582, 5580])).
% 52.61/52.88  tff(5584,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5583, 1358, 5578, 5577])).
% 52.61/52.88  tff(5585,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5584])).
% 52.61/52.88  tff(5586,plain,((~(X!1 = n15)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5587,plain,
% 52.61/52.88      (~(X!1 = n15)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5586, 5543])).
% 52.61/52.88  tff(5588,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[340, 308])).
% 52.61/52.88  tff(5589,plain,
% 52.61/52.88      (sum(n3, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5588])).
% 52.61/52.88  tff(5590,plain,
% 52.61/52.88      (n14 = sum(n3, n11)),
% 52.61/52.88      inference(symmetry,[status(thm)],[4982])).
% 52.61/52.88  tff(5591,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n15, n13)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[306, 335])).
% 52.61/52.88  tff(5592,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.61/52.88      inference(transitivity,[status(thm)],[5591, 3835])).
% 52.61/52.88  tff(5593,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n11, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[338, 303])).
% 52.61/52.88  tff(5594,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.61/52.88      inference(transitivity,[status(thm)],[5593, 4444])).
% 52.61/52.88  tff(5595,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5594, 5592])).
% 52.61/52.88  tff(5596,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5595, 405, 5590, 5589])).
% 52.61/52.88  tff(5597,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5596])).
% 52.61/52.88  tff(5598,plain,((~(X!1 = n12)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5599,plain,
% 52.61/52.88      (~(X!1 = n12)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5598, 5543])).
% 52.61/52.88  tff(5600,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[170, 308])).
% 52.61/52.88  tff(5601,plain,
% 52.61/52.88      (sum(n8, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5600])).
% 52.61/52.88  tff(5602,plain,
% 52.61/52.88      (n19 = sum(n8, n11)),
% 52.61/52.88      inference(symmetry,[status(thm)],[4930])).
% 52.61/52.88  tff(5603,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n15, n5)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[306, 165])).
% 52.61/52.88  tff(5604,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.88      inference(transitivity,[status(thm)],[5603, 3742])).
% 52.61/52.88  tff(5605,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n3, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[168, 303])).
% 52.61/52.88  tff(5606,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.88      inference(transitivity,[status(thm)],[5605, 1607])).
% 52.61/52.88  tff(5607,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[5606, 5604])).
% 52.61/52.88  tff(5608,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(transitivity,[status(thm)],[5607, 139, 5602, 5601])).
% 52.61/52.88  tff(5609,plain,
% 52.61/52.88      ($false),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[60, 5608])).
% 52.61/52.88  tff(5610,plain,((~(X!1 = n4)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.88  tff(5611,plain,
% 52.61/52.88      (~(X!1 = n4)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[5610, 5543])).
% 52.61/52.88  tff(5612,plain,
% 52.61/52.88      (~(X!1 = n16)),
% 52.61/52.88      inference(unit_resolution,[status(thm)],[4478, 5543])).
% 52.61/52.88  tff(5613,plain,
% 52.61/52.88      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n11)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[187, 308])).
% 52.61/52.88  tff(5614,plain,
% 52.61/52.88      (sum(n10, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.88      inference(symmetry,[status(thm)],[5613])).
% 52.61/52.88  tff(5615,plain,
% 52.61/52.88      (n0 = sum(n10, n11)),
% 52.61/52.88      inference(symmetry,[status(thm)],[2889])).
% 52.61/52.88  tff(5616,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = sum(n15, n6)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[306, 101])).
% 52.61/52.88  tff(5617,plain,
% 52.61/52.88      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.88      inference(transitivity,[status(thm)],[5616, 2485])).
% 52.61/52.88  tff(5618,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = sum(n4, n17)),
% 52.61/52.88      inference(monotonicity,[status(thm)],[111, 303])).
% 52.61/52.88  tff(5619,plain,
% 52.61/52.88      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.88      inference(transitivity,[status(thm)],[5618, 1798])).
% 52.61/52.88  tff(5620,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5619, 5617])).
% 52.61/52.89  tff(5621,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5620, 75, 5615, 5614])).
% 52.61/52.89  tff(5622,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5621])).
% 52.61/52.89  tff(5623,plain,((~(X!1 = n5)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5624,plain,
% 52.61/52.89      (~(X!1 = n5)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5623, 5543])).
% 52.61/52.89  tff(5625,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n11)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[937, 308])).
% 52.61/52.89  tff(5626,plain,
% 52.61/52.89      (sum(n12, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5625])).
% 52.61/52.89  tff(5627,plain,
% 52.61/52.89      (sum(n12, n11) = n2),
% 52.61/52.89      inference(and_elim,[status(thm)],[9])).
% 52.61/52.89  tff(5628,plain,
% 52.61/52.89      (n2 = sum(n12, n11)),
% 52.61/52.89      inference(symmetry,[status(thm)],[5627])).
% 52.61/52.89  tff(5629,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n15, n7)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[306, 933])).
% 52.61/52.89  tff(5630,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.89      inference(transitivity,[status(thm)],[5629, 3808])).
% 52.61/52.89  tff(5631,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n5, n17)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[935, 303])).
% 52.61/52.89  tff(5632,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.89      inference(transitivity,[status(thm)],[5631, 1629])).
% 52.61/52.89  tff(5633,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5632, 5630])).
% 52.61/52.89  tff(5634,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5633, 599, 5628, 5626])).
% 52.61/52.89  tff(5635,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5634])).
% 52.61/52.89  tff(5636,plain,((~(X!1 = n6)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5637,plain,
% 52.61/52.89      (~(X!1 = n6)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5636, 5543])).
% 52.61/52.89  tff(5638,plain,
% 52.61/52.89      ((Y!0 = n18) <=> (n16 = n18)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5543])).
% 52.61/52.89  tff(5639,plain,
% 52.61/52.89      ((n16 = n18) <=> (Y!0 = n18)),
% 52.61/52.89      inference(symmetry,[status(thm)],[5638])).
% 52.61/52.89  tff(5640,plain,
% 52.61/52.89      ((~(n16 = n18)) <=> (~(Y!0 = n18))),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5639])).
% 52.61/52.89  tff(5641,plain,
% 52.61/52.89      (~(n16 = n18)),
% 52.61/52.89      inference(and_elim,[status(thm)],[9])).
% 52.61/52.89  tff(5642,plain,
% 52.61/52.89      (~(Y!0 = n18)),
% 52.61/52.89      inference(modus_ponens,[status(thm)],[5641, 5640])).
% 52.61/52.89  tff(5643,plain,
% 52.61/52.89      (~(X!1 = n18)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[3831, 5543])).
% 52.61/52.89  tff(5644,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n11)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[46, 308])).
% 52.61/52.89  tff(5645,plain,
% 52.61/52.89      (sum(n14, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5644])).
% 52.61/52.89  tff(5646,plain,
% 52.61/52.89      (n4 = sum(n14, n11)),
% 52.61/52.89      inference(symmetry,[status(thm)],[265])).
% 52.61/52.89  tff(5647,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n15, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[306, 41])).
% 52.61/52.89  tff(5648,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.89      inference(transitivity,[status(thm)],[5647, 1164])).
% 52.61/52.89  tff(5649,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n6, n17)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[44, 303])).
% 52.61/52.89  tff(5650,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.89      inference(transitivity,[status(thm)],[5649, 1161])).
% 52.61/52.89  tff(5651,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5650, 5648])).
% 52.61/52.89  tff(5652,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5651, 583, 5646, 5645])).
% 52.61/52.89  tff(5653,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5652])).
% 52.61/52.89  tff(5654,plain,((~(X!1 = n7)) | (~(Y!0 = n16))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5655,plain,
% 52.61/52.89      (~(X!1 = n7)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5654, 5543])).
% 52.61/52.89  tff(5656,plain,
% 52.61/52.89      (X!1 = n14),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[4720, 5655, 24, 5643, 5642, 5637, 5624, 5612, 5611, 5599, 5587, 5575, 5563, 5562, 5550])).
% 52.61/52.89  tff(5657,plain,
% 52.61/52.89      (succ(X!1) = succ(n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5656])).
% 52.61/52.89  tff(5658,plain,
% 52.61/52.89      (succ(X!1) = n15),
% 52.61/52.89      inference(transitivity,[status(thm)],[5657, 11])).
% 52.61/52.89  tff(5659,plain,
% 52.61/52.89      (pred(X!1) = pred(n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5656])).
% 52.61/52.89  tff(5660,plain,
% 52.61/52.89      (pred(X!1) = n13),
% 52.61/52.89      inference(transitivity,[status(thm)],[5659, 279])).
% 52.61/52.89  tff(5661,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = sum(n13, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5660, 5658])).
% 52.61/52.89  tff(5662,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = n7),
% 52.61/52.89      inference(transitivity,[status(thm)],[5661, 10])).
% 52.61/52.89  tff(5663,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n11)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5662, 5549])).
% 52.61/52.89  tff(5664,plain,
% 52.61/52.89      (sum(n7, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5663])).
% 52.61/52.89  tff(5665,plain,
% 52.61/52.89      (n18 = sum(n7, n11)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1980])).
% 52.61/52.89  tff(5666,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n15, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5547, 5658])).
% 52.61/52.89  tff(5667,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.89      inference(transitivity,[status(thm)],[5666, 513])).
% 52.61/52.89  tff(5668,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n17)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5660, 5545])).
% 52.61/52.89  tff(5669,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.89      inference(transitivity,[status(thm)],[5668, 2185])).
% 52.61/52.89  tff(5670,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5669, 5667])).
% 52.61/52.89  tff(5671,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5670, 1315, 5665, 5664])).
% 52.61/52.89  tff(5672,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5671])).
% 52.61/52.89  tff(5673,plain,((X!1 = n13) | (Y!0 = n1) | (Y!0 = n2) | (Y!0 = n7) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5674,plain,
% 52.61/52.89      (X!1 = n13),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5673, 4746, 4748, 4747, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.89  tff(5675,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1626, 1456])).
% 52.61/52.89  tff(5676,plain,
% 52.61/52.89      (sum(n5, n15) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5675])).
% 52.61/52.89  tff(5677,plain,
% 52.61/52.89      (n20 = sum(n5, n15)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1026])).
% 52.61/52.89  tff(5678,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n17, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1454, 1622])).
% 52.61/52.89  tff(5679,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.89      inference(transitivity,[status(thm)],[5678, 3746])).
% 52.61/52.89  tff(5680,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n12, n19)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1624, 1452])).
% 52.61/52.89  tff(5681,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.89      inference(transitivity,[status(thm)],[5680, 3346])).
% 52.61/52.89  tff(5682,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5681, 5679])).
% 52.61/52.89  tff(5683,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5682, 1358, 5677, 5676])).
% 52.61/52.89  tff(5684,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5683])).
% 52.61/52.89  tff(5685,plain,((~(Y!0 = n18)) | (~(X!1 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5686,plain,
% 52.61/52.89      (~(Y!0 = n18)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5685, 5674])).
% 52.61/52.89  tff(5687,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n3)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1626, 1413])).
% 52.61/52.89  tff(5688,plain,
% 52.61/52.89      (sum(n5, n3) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5687])).
% 52.61/52.89  tff(5689,plain,
% 52.61/52.89      (n8 = sum(n5, n3)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1761])).
% 52.61/52.89  tff(5690,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n11, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1411, 1622])).
% 52.61/52.89  tff(5691,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.89      inference(transitivity,[status(thm)],[5690, 347])).
% 52.61/52.89  tff(5692,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n12, n13)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1624, 1409])).
% 52.61/52.89  tff(5693,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.89      inference(transitivity,[status(thm)],[5692, 344])).
% 52.61/52.89  tff(5694,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5693, 5691])).
% 52.61/52.89  tff(5695,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5694, 264, 5689, 5688])).
% 52.61/52.89  tff(5696,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5695])).
% 52.61/52.89  tff(5697,plain,((~(Y!0 = n12)) | (~(X!1 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5698,plain,
% 52.61/52.89      (~(Y!0 = n12)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5697, 5674])).
% 52.61/52.89  tff(5699,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n20)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1626, 1435])).
% 52.61/52.89  tff(5700,plain,
% 52.61/52.89      (sum(n5, n20) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5699])).
% 52.61/52.89  tff(5701,plain,
% 52.61/52.89      (n4 = sum(n5, n20)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1523])).
% 52.61/52.89  tff(5702,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n9, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1433, 1622])).
% 52.61/52.89  tff(5703,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.89      inference(transitivity,[status(thm)],[5702, 1116])).
% 52.61/52.89  tff(5704,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n12, n11)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1624, 1431])).
% 52.61/52.89  tff(5705,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.89      inference(transitivity,[status(thm)],[5704, 5627])).
% 52.61/52.89  tff(5706,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5705, 5703])).
% 52.61/52.89  tff(5707,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5706, 583, 5701, 5700])).
% 52.61/52.89  tff(5708,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5707])).
% 52.61/52.89  tff(5709,plain,((~(Y!0 = n10)) | (~(X!1 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5710,plain,
% 52.61/52.89      (~(Y!0 = n10)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5709, 5674])).
% 52.61/52.89  tff(5711,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1626, 1477])).
% 52.61/52.89  tff(5712,plain,
% 52.61/52.89      (sum(n5, n8) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5711])).
% 52.61/52.89  tff(5713,plain,
% 52.61/52.89      (n13 = sum(n5, n8)),
% 52.61/52.89      inference(symmetry,[status(thm)],[52])).
% 52.61/52.89  tff(5714,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n3, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1475, 1622])).
% 52.61/52.89  tff(5715,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.61/52.89      inference(transitivity,[status(thm)],[5714, 362])).
% 52.61/52.89  tff(5716,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n12, n5)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1624, 1473])).
% 52.61/52.89  tff(5717,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.61/52.89      inference(transitivity,[status(thm)],[5716, 359])).
% 52.61/52.89  tff(5718,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5717, 5715])).
% 52.61/52.89  tff(5719,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5718, 358, 5713, 5712])).
% 52.61/52.89  tff(5720,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5719])).
% 52.61/52.89  tff(5721,plain,((~(Y!0 = n4)) | (~(X!1 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5722,plain,
% 52.61/52.89      (~(Y!0 = n4)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5721, 5674])).
% 52.61/52.89  tff(5723,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n13)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1626, 1392])).
% 52.61/52.89  tff(5724,plain,
% 52.61/52.89      (sum(n5, n13) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5723])).
% 52.61/52.89  tff(5725,plain,
% 52.61/52.89      (n18 = sum(n5, n13)),
% 52.61/52.89      inference(symmetry,[status(thm)],[5475])).
% 52.61/52.89  tff(5726,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n16, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1390, 1622])).
% 52.61/52.89  tff(5727,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.89      inference(transitivity,[status(thm)],[5726, 1058])).
% 52.61/52.89  tff(5728,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n12, n18)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[1624, 1387])).
% 52.61/52.89  tff(5729,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.89      inference(transitivity,[status(thm)],[5728, 968])).
% 52.61/52.89  tff(5730,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5729, 5727])).
% 52.61/52.89  tff(5731,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5730, 1315, 5725, 5724])).
% 52.61/52.89  tff(5732,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5731])).
% 52.61/52.89  tff(5733,plain,((~(Y!0 = n17)) | (~(X!1 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5734,plain,
% 52.61/52.89      (~(Y!0 = n17)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5733, 5674])).
% 52.61/52.89  tff(5735,plain,
% 52.61/52.89      (Y!0 = n16),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5042, 5734, 4748, 4747, 5722, 5710, 5698, 5686, 4746, 4745, 4744, 4743, 4742, 4741, 4740, 4739])).
% 52.61/52.89  tff(5736,plain,
% 52.61/52.89      (succ(Y!0) = succ(n16)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5735])).
% 52.61/52.89  tff(5737,plain,
% 52.61/52.89      (succ(Y!0) = n17),
% 52.61/52.89      inference(transitivity,[status(thm)],[5736, 300])).
% 52.61/52.89  tff(5738,plain,
% 52.61/52.89      (pred(Y!0) = pred(n16)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5735])).
% 52.61/52.89  tff(5739,plain,
% 52.61/52.89      (pred(Y!0) = n15),
% 52.61/52.89      inference(transitivity,[status(thm)],[5738, 304])).
% 52.61/52.89  tff(5740,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(Y!0)) = sum(n15, n17)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5739, 5737])).
% 52.61/52.89  tff(5741,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(Y!0)) = n11),
% 52.61/52.89      inference(transitivity,[status(thm)],[5740, 299])).
% 52.61/52.89  tff(5742,plain,
% 52.61/52.89      (succ(X!1) = succ(n13)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5674])).
% 52.61/52.89  tff(5743,plain,
% 52.61/52.89      (succ(X!1) = n14),
% 52.61/52.89      inference(transitivity,[status(thm)],[5742, 23])).
% 52.61/52.89  tff(5744,plain,
% 52.61/52.89      (pred(X!1) = pred(n13)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5674])).
% 52.61/52.89  tff(5745,plain,
% 52.61/52.89      (pred(X!1) = n12),
% 52.61/52.89      inference(transitivity,[status(thm)],[5744, 328])).
% 52.61/52.89  tff(5746,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = sum(n12, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5745, 5743])).
% 52.61/52.89  tff(5747,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = n5),
% 52.61/52.89      inference(transitivity,[status(thm)],[5746, 22])).
% 52.61/52.89  tff(5748,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n11)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5747, 5741])).
% 52.61/52.89  tff(5749,plain,
% 52.61/52.89      (sum(n5, n11) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5748])).
% 52.61/52.89  tff(5750,plain,
% 52.61/52.89      (n16 = sum(n5, n11)),
% 52.61/52.89      inference(symmetry,[status(thm)],[249])).
% 52.61/52.89  tff(5751,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n15, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5739, 5743])).
% 52.61/52.89  tff(5752,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5751, 1207])).
% 52.61/52.89  tff(5753,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n12, n17)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5745, 5737])).
% 52.61/52.89  tff(5754,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5753, 1518])).
% 52.61/52.89  tff(5755,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5754, 5752])).
% 52.61/52.89  tff(5756,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5755, 209, 5750, 5749])).
% 52.61/52.89  tff(5757,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5756])).
% 52.61/52.89  tff(5758,plain,((Y!0 = n7) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5759,plain,
% 52.61/52.89      ((Y!0 = n2) | (Y!0 = n1) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5758, 4738])).
% 52.61/52.89  tff(5760,plain,
% 52.61/52.89      (Y!0 = n2),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5759, 1048, 1033, 1019, 1006, 995, 980, 965, 951])).
% 52.61/52.89  tff(5761,plain,
% 52.61/52.89      (succ(Y!0) = succ(n2)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5760])).
% 52.61/52.89  tff(5762,plain,
% 52.61/52.89      (succ(Y!0) = n3),
% 52.61/52.89      inference(transitivity,[status(thm)],[5761, 789])).
% 52.61/52.89  tff(5763,plain,
% 52.61/52.89      (pred(Y!0) = pred(n2)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5760])).
% 52.61/52.89  tff(5764,plain,
% 52.61/52.89      (pred(Y!0) = n1),
% 52.61/52.89      inference(transitivity,[status(thm)],[5763, 793])).
% 52.61/52.89  tff(5765,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(Y!0)) = sum(n1, n3)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5764, 5762])).
% 52.61/52.89  tff(5766,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(Y!0)) = n4),
% 52.61/52.89      inference(transitivity,[status(thm)],[5765, 788])).
% 52.61/52.89  tff(5767,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n12, n4)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[937, 5766])).
% 52.61/52.89  tff(5768,plain,
% 52.61/52.89      (sum(n12, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5767])).
% 52.61/52.89  tff(5769,plain,
% 52.61/52.89      (n16 = sum(n12, n4)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1274])).
% 52.61/52.89  tff(5770,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n1, n7)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5764, 933])).
% 52.61/52.89  tff(5771,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5770, 1764])).
% 52.61/52.89  tff(5772,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n5, n3)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[935, 5762])).
% 52.61/52.89  tff(5773,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5772, 1761])).
% 52.61/52.89  tff(5774,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5773, 5771])).
% 52.61/52.89  tff(5775,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5774, 209, 5769, 5768])).
% 52.61/52.89  tff(5776,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5775])).
% 52.61/52.89  tff(5777,plain,(~(X!1 = n6)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5778,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n4)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[534, 797])).
% 52.61/52.89  tff(5779,plain,
% 52.61/52.89      (sum(n16, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5778])).
% 52.61/52.89  tff(5780,plain,
% 52.61/52.89      (n20 = sum(n16, n4)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1396])).
% 52.61/52.89  tff(5781,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n1, n9)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[795, 529])).
% 52.61/52.89  tff(5782,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.89      inference(transitivity,[status(thm)],[5781, 4632])).
% 52.61/52.89  tff(5783,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n7, n3)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[532, 792])).
% 52.61/52.89  tff(5784,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.89      inference(transitivity,[status(thm)],[5783, 4629])).
% 52.61/52.89  tff(5785,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5784, 5782])).
% 52.61/52.89  tff(5786,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5785, 1358, 5780, 5779])).
% 52.61/52.89  tff(5787,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5786])).
% 52.61/52.89  tff(5788,plain,((~(X!1 = n8)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5789,plain,
% 52.61/52.89      (~(X!1 = n8)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5788, 790])).
% 52.61/52.89  tff(5790,plain,
% 52.61/52.89      (X!1 = n7),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5280, 5789, 5777, 24, 930, 908, 893, 879, 864, 849, 834, 819])).
% 52.61/52.89  tff(5791,plain,
% 52.61/52.89      (succ(X!1) = succ(n7)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5790])).
% 52.61/52.89  tff(5792,plain,
% 52.61/52.89      (succ(X!1) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5791, 38])).
% 52.61/52.89  tff(5793,plain,
% 52.61/52.89      (pred(X!1) = pred(n7)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5790])).
% 52.61/52.89  tff(5794,plain,
% 52.61/52.89      (pred(X!1) = n6),
% 52.61/52.89      inference(transitivity,[status(thm)],[5793, 42])).
% 52.61/52.89  tff(5795,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = sum(n6, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5794, 5792])).
% 52.61/52.89  tff(5796,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = n14),
% 52.61/52.89      inference(transitivity,[status(thm)],[5795, 37])).
% 52.61/52.89  tff(5797,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n4)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5796, 797])).
% 52.61/52.89  tff(5798,plain,
% 52.61/52.89      (sum(n14, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5797])).
% 52.61/52.89  tff(5799,plain,
% 52.61/52.89      (n18 = sum(n14, n4)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1330])).
% 52.61/52.89  tff(5800,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n1, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[795, 5792])).
% 52.61/52.89  tff(5801,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.89      inference(transitivity,[status(thm)],[5800, 1816])).
% 52.61/52.89  tff(5802,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n6, n3)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5794, 792])).
% 52.61/52.89  tff(5803,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.89      inference(transitivity,[status(thm)],[5802, 1416])).
% 52.61/52.89  tff(5804,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5803, 5801])).
% 52.61/52.89  tff(5805,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5804, 1315, 5799, 5798])).
% 52.61/52.89  tff(5806,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5805])).
% 52.61/52.89  tff(5807,plain,((~(Y!0 = n2)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5808,plain,
% 52.61/52.89      (~(Y!0 = n2)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5807, 24])).
% 52.61/52.89  tff(5809,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n5)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[915, 332])).
% 52.61/52.89  tff(5810,plain,
% 52.61/52.89      (sum(n7, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5809])).
% 52.61/52.89  tff(5811,plain,
% 52.61/52.89      (n12 = sum(n7, n5)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1902])).
% 52.61/52.89  tff(5812,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n12, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[330, 911])).
% 52.61/52.89  tff(5813,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.89      inference(transitivity,[status(thm)],[5812, 5269])).
% 52.61/52.89  tff(5814,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 327])).
% 52.61/52.89  tff(5815,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.89      inference(transitivity,[status(thm)],[5814, 2212])).
% 52.61/52.89  tff(5816,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5815, 5813])).
% 52.61/52.89  tff(5817,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5816, 127, 5811, 5810])).
% 52.61/52.89  tff(5818,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5817])).
% 52.61/52.89  tff(5819,plain,((~(Y!0 = n13)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5820,plain,
% 52.61/52.89      (~(Y!0 = n13)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5819, 909])).
% 52.61/52.89  tff(5821,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n18)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[915, 160])).
% 52.61/52.89  tff(5822,plain,
% 52.61/52.89      (sum(n7, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5821])).
% 52.61/52.89  tff(5823,plain,
% 52.61/52.89      (n4 = sum(n7, n18)),
% 52.61/52.89      inference(symmetry,[status(thm)],[2278])).
% 52.61/52.89  tff(5824,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n8, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[158, 911])).
% 52.61/52.89  tff(5825,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.89      inference(transitivity,[status(thm)],[5824, 5256])).
% 52.61/52.89  tff(5826,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n10)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 155])).
% 52.61/52.89  tff(5827,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.89      inference(transitivity,[status(thm)],[5826, 2145])).
% 52.61/52.89  tff(5828,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5827, 5825])).
% 52.61/52.89  tff(5829,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5828, 583, 5823, 5822])).
% 52.61/52.89  tff(5830,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5829])).
% 52.61/52.89  tff(5831,plain,((~(Y!0 = n9)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5832,plain,
% 52.61/52.89      (~(Y!0 = n9)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5831, 909])).
% 52.61/52.89  tff(5833,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n10)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[915, 96])).
% 52.61/52.89  tff(5834,plain,
% 52.61/52.89      (sum(n7, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5833])).
% 52.61/52.89  tff(5835,plain,
% 52.61/52.89      (n17 = sum(n7, n10)),
% 52.61/52.89      inference(symmetry,[status(thm)],[542])).
% 52.61/52.89  tff(5836,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n4, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[94, 911])).
% 52.61/52.89  tff(5837,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.89      inference(transitivity,[status(thm)],[5836, 1879])).
% 52.61/52.89  tff(5838,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n6)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 91])).
% 52.61/52.89  tff(5839,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.89      inference(transitivity,[status(thm)],[5838, 2459])).
% 52.61/52.89  tff(5840,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5839, 5837])).
% 52.61/52.89  tff(5841,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5840, 776, 5835, 5834])).
% 52.61/52.89  tff(5842,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5841])).
% 52.61/52.89  tff(5843,plain,((~(Y!0 = n5)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5844,plain,
% 52.61/52.89      (~(Y!0 = n5)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5843, 909])).
% 52.61/52.89  tff(5845,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n12)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[915, 34])).
% 52.61/52.89  tff(5846,plain,
% 52.61/52.89      (sum(n7, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5845])).
% 52.61/52.89  tff(5847,plain,
% 52.61/52.89      (n19 = sum(n7, n12)),
% 52.61/52.89      inference(symmetry,[status(thm)],[1993])).
% 52.61/52.89  tff(5848,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n5, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[32, 911])).
% 52.61/52.89  tff(5849,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.89      inference(transitivity,[status(thm)],[5848, 1026])).
% 52.61/52.89  tff(5850,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n7)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 29])).
% 52.61/52.89  tff(5851,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.89      inference(transitivity,[status(thm)],[5850, 1023])).
% 52.61/52.89  tff(5852,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5851, 5849])).
% 52.61/52.89  tff(5853,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5852, 139, 5847, 5846])).
% 52.61/52.89  tff(5854,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5853])).
% 52.61/52.89  tff(5855,plain,((~(Y!0 = n6)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5856,plain,
% 52.61/52.89      (~(Y!0 = n6)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5855, 909])).
% 52.61/52.89  tff(5857,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n9)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[915, 21])).
% 52.61/52.89  tff(5858,plain,
% 52.61/52.89      (sum(n7, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5857])).
% 52.61/52.89  tff(5859,plain,
% 52.61/52.89      (n16 = sum(n7, n9)),
% 52.61/52.89      inference(symmetry,[status(thm)],[526])).
% 52.61/52.89  tff(5860,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n14, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[19, 911])).
% 52.61/52.89  tff(5861,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5860, 5182])).
% 52.61/52.89  tff(5862,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n16)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 16])).
% 52.61/52.89  tff(5863,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.89      inference(transitivity,[status(thm)],[5862, 2276])).
% 52.61/52.89  tff(5864,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5863, 5861])).
% 52.61/52.89  tff(5865,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(transitivity,[status(thm)],[5864, 209, 5859, 5858])).
% 52.61/52.89  tff(5866,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5865])).
% 52.61/52.89  tff(5867,plain,((~(Y!0 = n15)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5868,plain,
% 52.61/52.89      (~(Y!0 = n15)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5867, 909])).
% 52.61/52.89  tff(5869,plain,
% 52.61/52.89      (succ(n14) = succ(X!1)),
% 52.61/52.89      inference(symmetry,[status(thm)],[910])).
% 52.61/52.89  tff(5870,plain,
% 52.61/52.89      (succ(Y!0) = succ(X!1)),
% 52.61/52.89      inference(transitivity,[status(thm)],[277, 5869])).
% 52.61/52.89  tff(5871,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5870])).
% 52.61/52.89  tff(5872,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 278])).
% 52.61/52.89  tff(5873,plain,
% 52.61/52.89      (sum(n13, n15) = sum(pred(X!1), succ(Y!0))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5872])).
% 52.61/52.89  tff(5874,plain,
% 52.61/52.89      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.61/52.89      inference(transitivity,[status(thm)],[914, 5873])).
% 52.61/52.89  tff(5875,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5874, 5871])).
% 52.61/52.89  tff(5876,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5875])).
% 52.61/52.89  tff(5877,plain,
% 52.61/52.89      ($false),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[60, 5876])).
% 52.61/52.89  tff(5878,plain,((~(Y!0 = n14)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.89  tff(5879,plain,
% 52.61/52.89      (~(Y!0 = n14)),
% 52.61/52.89      inference(unit_resolution,[status(thm)],[5878, 909])).
% 52.61/52.89  tff(5880,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n0)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[915, 425])).
% 52.61/52.89  tff(5881,plain,
% 52.61/52.89      (sum(n7, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.89      inference(symmetry,[status(thm)],[5880])).
% 52.61/52.89  tff(5882,plain,
% 52.61/52.89      (n7 = sum(n7, n0)),
% 52.61/52.89      inference(symmetry,[status(thm)],[3380])).
% 52.61/52.89  tff(5883,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = sum(n20, n15)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[423, 911])).
% 52.61/52.89  tff(5884,plain,
% 52.61/52.89      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.61/52.89      inference(transitivity,[status(thm)],[5883, 3204])).
% 52.61/52.89  tff(5885,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = sum(n13, n1)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[913, 420])).
% 52.61/52.89  tff(5886,plain,
% 52.61/52.89      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.61/52.89      inference(transitivity,[status(thm)],[5885, 2969])).
% 52.61/52.89  tff(5887,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.61/52.89      inference(monotonicity,[status(thm)],[5886, 5884])).
% 52.61/52.89  tff(5888,plain,
% 52.61/52.89      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5887, 192, 5882, 5881])).
% 52.61/52.90  tff(5889,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5888])).
% 52.61/52.90  tff(5890,plain,((~(Y!0 = n0)) | (~(X!1 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5891,plain,
% 52.61/52.90      (~(Y!0 = n0)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5890, 909])).
% 52.61/52.90  tff(5892,plain,
% 52.61/52.90      (Y!0 = n1),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5759, 5891, 4748, 5879, 5868, 5856, 5844, 5832, 5820])).
% 52.61/52.90  tff(5893,plain,
% 52.61/52.90      (succ(Y!0) = succ(n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5892])).
% 52.61/52.90  tff(5894,plain,
% 52.61/52.90      (succ(Y!0) = n2),
% 52.61/52.90      inference(transitivity,[status(thm)],[5893, 627])).
% 52.61/52.90  tff(5895,plain,
% 52.61/52.90      (pred(Y!0) = pred(n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5892])).
% 52.61/52.90  tff(5896,plain,
% 52.61/52.90      (pred(Y!0) = n0),
% 52.61/52.90      inference(transitivity,[status(thm)],[5895, 631])).
% 52.61/52.90  tff(5897,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = sum(n0, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5896, 5894])).
% 52.61/52.90  tff(5898,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = n2),
% 52.61/52.90      inference(transitivity,[status(thm)],[5897, 626])).
% 52.61/52.90  tff(5899,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n7, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[915, 5898])).
% 52.61/52.90  tff(5900,plain,
% 52.61/52.90      (sum(n7, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5899])).
% 52.61/52.90  tff(5901,plain,
% 52.61/52.90      (n9 = sum(n7, n2)),
% 52.61/52.90      inference(symmetry,[status(thm)],[2579])).
% 52.61/52.90  tff(5902,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n0, n15)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5896, 911])).
% 52.61/52.90  tff(5903,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.61/52.90      inference(transitivity,[status(thm)],[5902, 2705])).
% 52.61/52.90  tff(5904,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n13, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[913, 5894])).
% 52.61/52.90  tff(5905,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.61/52.90      inference(transitivity,[status(thm)],[5904, 2089])).
% 52.61/52.90  tff(5906,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5905, 5903])).
% 52.61/52.90  tff(5907,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5906, 513, 5901, 5900])).
% 52.61/52.90  tff(5908,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5907])).
% 52.61/52.90  tff(5909,plain,((~(X!1 = n14)) | (Y!0 = n2)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5910,plain,
% 52.61/52.90      (~(X!1 = n14)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5909, 5808])).
% 52.61/52.90  tff(5911,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[804, 635])).
% 52.61/52.90  tff(5912,plain,
% 52.61/52.90      (sum(n18, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5911])).
% 52.61/52.90  tff(5913,plain,
% 52.61/52.90      (n20 = sum(n18, n2)),
% 52.61/52.90      inference(symmetry,[status(thm)],[2764])).
% 52.61/52.90  tff(5914,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n0, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[633, 800])).
% 52.61/52.90  tff(5915,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.90      inference(transitivity,[status(thm)],[5914, 2656])).
% 52.61/52.90  tff(5916,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 630])).
% 52.61/52.90  tff(5917,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.90      inference(transitivity,[status(thm)],[5916, 704])).
% 52.61/52.90  tff(5918,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5917, 5915])).
% 52.61/52.90  tff(5919,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5918, 1358, 5913, 5912])).
% 52.61/52.90  tff(5920,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5919])).
% 52.61/52.90  tff(5921,plain,((~(X!1 = n9)) | (~(Y!0 = n1))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5922,plain,
% 52.61/52.90      (~(X!1 = n9)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5921, 628])).
% 52.61/52.90  tff(5923,plain,
% 52.61/52.90      ((X!1 = n18) | (X!1 = n2) | (X!1 = n3) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (Y!0 = n18)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[4353, 3686])).
% 52.61/52.90  tff(5924,plain,
% 52.61/52.90      ((X!1 = n18) | (X!1 = n3) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (Y!0 = n18)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5923, 4667])).
% 52.61/52.90  tff(5925,plain,
% 52.61/52.90      ((X!1 = n18) | (X!1 = n16) | (X!1 = n15) | (X!1 = n14) | (X!1 = n13) | (X!1 = n12) | (X!1 = n11) | (X!1 = n10) | (X!1 = n9) | (X!1 = n8) | (X!1 = n7) | (X!1 = n6) | (X!1 = n5) | (X!1 = n4) | (Y!0 = n18)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5924, 4717])).
% 52.61/52.90  tff(5926,plain,
% 52.61/52.90      (X!1 = n8),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5925, 5922, 5777, 24, 5910, 787, 762, 757, 744, 729, 715, 701, 687, 672, 657])).
% 52.61/52.90  tff(5927,plain,
% 52.61/52.90      (succ(X!1) = succ(n8)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5926])).
% 52.61/52.90  tff(5928,plain,
% 52.61/52.90      (succ(X!1) = n9),
% 52.61/52.90      inference(transitivity,[status(thm)],[5927, 527])).
% 52.61/52.90  tff(5929,plain,
% 52.61/52.90      (pred(X!1) = pred(n8)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5926])).
% 52.61/52.90  tff(5930,plain,
% 52.61/52.90      (pred(X!1) = n7),
% 52.61/52.90      inference(transitivity,[status(thm)],[5929, 530])).
% 52.61/52.90  tff(5931,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = sum(n7, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5930, 5928])).
% 52.61/52.90  tff(5932,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = n16),
% 52.61/52.90      inference(transitivity,[status(thm)],[5931, 526])).
% 52.61/52.90  tff(5933,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5932, 635])).
% 52.61/52.90  tff(5934,plain,
% 52.61/52.90      (sum(n16, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5933])).
% 52.61/52.90  tff(5935,plain,
% 52.61/52.90      (n18 = sum(n16, n2)),
% 52.61/52.90      inference(symmetry,[status(thm)],[2094])).
% 52.61/52.90  tff(5936,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n0, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[633, 5928])).
% 52.61/52.90  tff(5937,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.90      inference(transitivity,[status(thm)],[5936, 2582])).
% 52.61/52.90  tff(5938,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n7, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5930, 630])).
% 52.61/52.90  tff(5939,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.90      inference(transitivity,[status(thm)],[5938, 2579])).
% 52.61/52.90  tff(5940,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5939, 5937])).
% 52.61/52.90  tff(5941,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5940, 1315, 5935, 5934])).
% 52.61/52.90  tff(5942,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5941])).
% 52.61/52.90  tff(5943,plain,((~(Y!0 = n1)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5944,plain,
% 52.61/52.90      (~(Y!0 = n1)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5943, 24])).
% 52.61/52.90  tff(5945,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n5)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[534, 332])).
% 52.61/52.90  tff(5946,plain,
% 52.61/52.90      (sum(n16, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5945])).
% 52.61/52.90  tff(5947,plain,
% 52.61/52.90      (n0 = sum(n16, n5)),
% 52.61/52.90      inference(symmetry,[status(thm)],[2294])).
% 52.61/52.90  tff(5948,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n12, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[330, 529])).
% 52.61/52.90  tff(5949,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.90      inference(transitivity,[status(thm)],[5948, 1009])).
% 52.61/52.90  tff(5950,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n7, n14)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[532, 327])).
% 52.61/52.90  tff(5951,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.90      inference(transitivity,[status(thm)],[5950, 1174])).
% 52.61/52.90  tff(5952,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5951, 5949])).
% 52.61/52.90  tff(5953,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5952, 75, 5947, 5946])).
% 52.61/52.90  tff(5954,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5953])).
% 52.61/52.90  tff(5955,plain,((~(Y!0 = n13)) | (~(X!1 = n8))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5956,plain,
% 52.61/52.90      (~(Y!0 = n13)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5955, 525])).
% 52.61/52.90  tff(5957,plain,
% 52.61/52.90      ((X!1 = n14) | (X!1 = n13) | (Y!0 = n1) | (Y!0 = n2) | (Y!0 = n17) | (Y!0 = n16) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5481, 4738])).
% 52.61/52.90  tff(5958,plain,
% 52.61/52.90      (Y!0 = n0),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5957, 5956, 5808, 5910, 4898, 24, 5944, 625, 610, 594, 578, 564, 549])).
% 52.61/52.90  tff(5959,plain,
% 52.61/52.90      (succ(Y!0) = succ(n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5958])).
% 52.61/52.90  tff(5960,plain,
% 52.61/52.90      (succ(Y!0) = n1),
% 52.61/52.90      inference(transitivity,[status(thm)],[5959, 417])).
% 52.61/52.90  tff(5961,plain,
% 52.61/52.90      (pred(Y!0) = pred(n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5958])).
% 52.61/52.90  tff(5962,plain,
% 52.61/52.90      (pred(Y!0) = n20),
% 52.61/52.90      inference(transitivity,[status(thm)],[5961, 421])).
% 52.61/52.90  tff(5963,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = sum(n20, n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5962, 5960])).
% 52.61/52.90  tff(5964,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = n0),
% 52.61/52.90      inference(transitivity,[status(thm)],[5963, 416])).
% 52.61/52.90  tff(5965,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n16, n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[534, 5964])).
% 52.61/52.90  tff(5966,plain,
% 52.61/52.90      (sum(n16, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5965])).
% 52.61/52.90  tff(5967,plain,
% 52.61/52.90      (n16 = sum(n16, n0)),
% 52.61/52.90      inference(symmetry,[status(thm)],[3491])).
% 52.61/52.90  tff(5968,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n20, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5962, 529])).
% 52.61/52.90  tff(5969,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.90      inference(transitivity,[status(thm)],[5968, 262])).
% 52.61/52.90  tff(5970,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n7, n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[532, 5960])).
% 52.61/52.90  tff(5971,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.90      inference(transitivity,[status(thm)],[5970, 2942])).
% 52.61/52.90  tff(5972,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5971, 5969])).
% 52.61/52.90  tff(5973,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5972, 209, 5967, 5966])).
% 52.61/52.90  tff(5974,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5973])).
% 52.61/52.90  tff(5975,plain,((~(X!1 = n8)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5976,plain,
% 52.61/52.90      (~(X!1 = n8)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5975, 24])).
% 52.61/52.90  tff(5977,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[244, 425])).
% 52.61/52.90  tff(5978,plain,
% 52.61/52.90      (sum(n20, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5977])).
% 52.61/52.90  tff(5979,plain,
% 52.61/52.90      (n20 = sum(n20, n0)),
% 52.61/52.90      inference(symmetry,[status(thm)],[3583])).
% 52.61/52.90  tff(5980,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n20, n11)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[423, 239])).
% 52.61/52.90  tff(5981,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.90      inference(transitivity,[status(thm)],[5980, 311])).
% 52.61/52.90  tff(5982,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n9, n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[242, 420])).
% 52.61/52.90  tff(5983,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.90      inference(transitivity,[status(thm)],[5982, 2956])).
% 52.61/52.90  tff(5984,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5983, 5981])).
% 52.61/52.90  tff(5985,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[5984, 1358, 5979, 5978])).
% 52.61/52.90  tff(5986,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 5985])).
% 52.61/52.90  tff(5987,plain,((~(X!1 = n10)) | (~(Y!0 = n0))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(5988,plain,
% 52.61/52.90      (~(X!1 = n10)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5987, 418])).
% 52.61/52.90  tff(5989,plain,
% 52.61/52.90      (X!1 = n9),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5280, 5988, 5777, 24, 5910, 5976, 524, 508, 493, 478, 463, 448])).
% 52.61/52.90  tff(5990,plain,
% 52.61/52.90      (succ(X!1) = succ(n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5989])).
% 52.61/52.90  tff(5991,plain,
% 52.61/52.90      (succ(X!1) = n10),
% 52.61/52.90      inference(transitivity,[status(thm)],[5990, 152])).
% 52.61/52.90  tff(5992,plain,
% 52.61/52.90      (pred(X!1) = pred(n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5989])).
% 52.61/52.90  tff(5993,plain,
% 52.61/52.90      (pred(X!1) = n8),
% 52.61/52.90      inference(transitivity,[status(thm)],[5992, 156])).
% 52.61/52.90  tff(5994,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = sum(n8, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5993, 5991])).
% 52.61/52.90  tff(5995,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = n18),
% 52.61/52.90      inference(transitivity,[status(thm)],[5994, 151])).
% 52.61/52.90  tff(5996,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5995, 425])).
% 52.61/52.90  tff(5997,plain,
% 52.61/52.90      (sum(n18, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[5996])).
% 52.61/52.90  tff(5998,plain,
% 52.61/52.90      (n18 = sum(n18, n0)),
% 52.61/52.90      inference(symmetry,[status(thm)],[3549])).
% 52.61/52.90  tff(5999,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n20, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[423, 5991])).
% 52.61/52.90  tff(6000,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.90      inference(transitivity,[status(thm)],[5999, 3155])).
% 52.61/52.90  tff(6001,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[5993, 420])).
% 52.61/52.90  tff(6002,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.90      inference(transitivity,[status(thm)],[6001, 2809])).
% 52.61/52.90  tff(6003,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6002, 6000])).
% 52.61/52.90  tff(6004,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6003, 1315, 5998, 5997])).
% 52.61/52.90  tff(6005,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6004])).
% 52.61/52.90  tff(6006,plain,((~(Y!0 = n0)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6007,plain,
% 52.61/52.90      (~(Y!0 = n0)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6006, 24])).
% 52.61/52.90  tff(6008,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[804, 96])).
% 52.61/52.90  tff(6009,plain,
% 52.61/52.90      (sum(n18, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6008])).
% 52.61/52.90  tff(6010,plain,
% 52.61/52.90      (n7 = sum(n18, n10)),
% 52.61/52.90      inference(symmetry,[status(thm)],[1564])).
% 52.61/52.90  tff(6011,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n4, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[94, 800])).
% 52.61/52.90  tff(6012,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.61/52.90      inference(transitivity,[status(thm)],[6011, 196])).
% 52.61/52.90  tff(6013,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n6)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 91])).
% 52.61/52.90  tff(6014,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.61/52.90      inference(transitivity,[status(thm)],[6013, 193])).
% 52.61/52.90  tff(6015,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6014, 6012])).
% 52.61/52.90  tff(6016,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6015, 192, 6010, 6009])).
% 52.61/52.90  tff(6017,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6016])).
% 52.61/52.90  tff(6018,plain,((~(Y!0 = n5)) | (~(X!1 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6019,plain,
% 52.61/52.90      (~(Y!0 = n5)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6018, 798])).
% 52.61/52.90  tff(6020,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n12)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[804, 34])).
% 52.61/52.90  tff(6021,plain,
% 52.61/52.90      (sum(n18, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6020])).
% 52.61/52.90  tff(6022,plain,
% 52.61/52.90      (n9 = sum(n18, n12)),
% 52.61/52.90      inference(symmetry,[status(thm)],[1594])).
% 52.61/52.90  tff(6023,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n5, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[32, 800])).
% 52.61/52.90  tff(6024,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.61/52.90      inference(transitivity,[status(thm)],[6023, 973])).
% 52.61/52.90  tff(6025,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n7)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 29])).
% 52.61/52.90  tff(6026,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.61/52.90      inference(transitivity,[status(thm)],[6025, 970])).
% 52.61/52.90  tff(6027,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6026, 6024])).
% 52.61/52.90  tff(6028,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6027, 513, 6022, 6021])).
% 52.61/52.90  tff(6029,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6028])).
% 52.61/52.90  tff(6030,plain,((~(Y!0 = n6)) | (~(X!1 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6031,plain,
% 52.61/52.90      (~(Y!0 = n6)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6030, 798])).
% 52.61/52.90  tff(6032,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[804, 21])).
% 52.61/52.90  tff(6033,plain,
% 52.61/52.90      (sum(n18, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6032])).
% 52.61/52.90  tff(6034,plain,
% 52.61/52.90      (n6 = sum(n18, n9)),
% 52.61/52.90      inference(symmetry,[status(thm)],[1549])).
% 52.61/52.90  tff(6035,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n14, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[19, 800])).
% 52.61/52.90  tff(6036,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.90      inference(transitivity,[status(thm)],[6035, 121])).
% 52.61/52.90  tff(6037,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n16)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 16])).
% 52.61/52.90  tff(6038,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.90      inference(transitivity,[status(thm)],[6037, 225])).
% 52.61/52.90  tff(6039,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6038, 6036])).
% 52.61/52.90  tff(6040,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6039, 224, 6034, 6033])).
% 52.61/52.90  tff(6041,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6040])).
% 52.61/52.90  tff(6042,plain,((~(Y!0 = n15)) | (~(X!1 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6043,plain,
% 52.61/52.90      (~(Y!0 = n15)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6042, 798])).
% 52.61/52.90  tff(6044,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n7)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[804, 283])).
% 52.61/52.90  tff(6045,plain,
% 52.61/52.90      (sum(n18, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6044])).
% 52.61/52.90  tff(6046,plain,
% 52.61/52.90      (n4 = sum(n18, n7)),
% 52.61/52.90      inference(symmetry,[status(thm)],[1520])).
% 52.61/52.90  tff(6047,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n13, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[281, 800])).
% 52.61/52.90  tff(6048,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.90      inference(transitivity,[status(thm)],[6047, 2145])).
% 52.61/52.90  tff(6049,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n15)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 278])).
% 52.61/52.90  tff(6050,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.90      inference(transitivity,[status(thm)],[6049, 5256])).
% 52.61/52.90  tff(6051,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6050, 6048])).
% 52.61/52.90  tff(6052,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6051, 583, 6046, 6045])).
% 52.61/52.90  tff(6053,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6052])).
% 52.61/52.90  tff(6054,plain,((~(Y!0 = n14)) | (~(X!1 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6055,plain,
% 52.61/52.90      (~(Y!0 = n14)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6054, 798])).
% 52.61/52.90  tff(6056,plain,
% 52.61/52.90      (succ(n9) = succ(X!1)),
% 52.61/52.90      inference(symmetry,[status(thm)],[799])).
% 52.61/52.90  tff(6057,plain,
% 52.61/52.90      (succ(Y!0) = succ(X!1)),
% 52.61/52.90      inference(transitivity,[status(thm)],[154, 6056])).
% 52.61/52.90  tff(6058,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6057])).
% 52.61/52.90  tff(6059,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 155])).
% 52.61/52.90  tff(6060,plain,
% 52.61/52.90      (sum(n8, n10) = sum(pred(X!1), succ(Y!0))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6059])).
% 52.61/52.90  tff(6061,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.61/52.90      inference(transitivity,[status(thm)],[803, 6060])).
% 52.61/52.90  tff(6062,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6061, 6058])).
% 52.61/52.90  tff(6063,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6062])).
% 52.61/52.90  tff(6064,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6063])).
% 52.61/52.90  tff(6065,plain,((~(Y!0 = n9)) | (~(X!1 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6066,plain,
% 52.61/52.90      (~(Y!0 = n9)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6065, 798])).
% 52.61/52.90  tff(6067,plain,
% 52.61/52.90      (Y!0 = n13),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5759, 6066, 4748, 4747, 4739, 6055, 6043, 6031, 6019])).
% 52.61/52.90  tff(6068,plain,
% 52.61/52.90      (succ(Y!0) = succ(n13)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6067])).
% 52.61/52.90  tff(6069,plain,
% 52.61/52.90      (succ(Y!0) = n14),
% 52.61/52.90      inference(transitivity,[status(thm)],[6068, 23])).
% 52.61/52.90  tff(6070,plain,
% 52.61/52.90      (pred(Y!0) = pred(n13)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6067])).
% 52.61/52.90  tff(6071,plain,
% 52.61/52.90      (pred(Y!0) = n12),
% 52.61/52.90      inference(transitivity,[status(thm)],[6070, 328])).
% 52.61/52.90  tff(6072,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = sum(n12, n14)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6071, 6069])).
% 52.61/52.90  tff(6073,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = n5),
% 52.61/52.90      inference(transitivity,[status(thm)],[6072, 22])).
% 52.61/52.90  tff(6074,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n18, n5)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[804, 6073])).
% 52.61/52.90  tff(6075,plain,
% 52.61/52.90      (sum(n18, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6074])).
% 52.61/52.90  tff(6076,plain,
% 52.61/52.90      (n2 = sum(n18, n5)),
% 52.61/52.90      inference(symmetry,[status(thm)],[1673])).
% 52.61/52.90  tff(6077,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n12, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6071, 800])).
% 52.61/52.90  tff(6078,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.90      inference(transitivity,[status(thm)],[6077, 983])).
% 52.61/52.90  tff(6079,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n8, n14)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[802, 6069])).
% 52.61/52.90  tff(6080,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.90      inference(transitivity,[status(thm)],[6079, 1145])).
% 52.61/52.90  tff(6081,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6080, 6078])).
% 52.61/52.90  tff(6082,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6081, 599, 6076, 6075])).
% 52.61/52.90  tff(6083,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6082])).
% 52.61/52.90  tff(6084,plain,((~(X!1 = n9)) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6085,plain,
% 52.61/52.90      (~(X!1 = n9)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6084, 5808, 5944, 6007])).
% 52.61/52.90  tff(6086,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n5)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[433, 332])).
% 52.61/52.90  tff(6087,plain,
% 52.61/52.90      (sum(n1, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6086])).
% 52.61/52.90  tff(6088,plain,
% 52.61/52.90      (n6 = sum(n1, n5)),
% 52.61/52.90      inference(symmetry,[status(thm)],[884])).
% 52.61/52.90  tff(6089,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n12, n12)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[330, 428])).
% 52.61/52.90  tff(6090,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n3),
% 52.61/52.90      inference(transitivity,[status(thm)],[6089, 123])).
% 52.61/52.90  tff(6091,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n10, n14)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[431, 327])).
% 52.61/52.90  tff(6092,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n3),
% 52.61/52.90      inference(transitivity,[status(thm)],[6091, 1189])).
% 52.61/52.90  tff(6093,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n3, n3)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6092, 6090])).
% 52.61/52.90  tff(6094,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6093, 224, 6088, 6087])).
% 52.61/52.90  tff(6095,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6094])).
% 52.61/52.90  tff(6096,plain,((~(X!1 = n11)) | (~(Y!0 = n13))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6097,plain,
% 52.61/52.90      (~(X!1 = n11)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6096, 325])).
% 52.61/52.90  tff(6098,plain,
% 52.61/52.90      (X!1 = n10),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5280, 6097, 5777, 24, 5910, 5976, 6085, 415, 400, 385, 369, 354])).
% 52.61/52.90  tff(6099,plain,
% 52.61/52.90      (succ(X!1) = succ(n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6098])).
% 52.61/52.90  tff(6100,plain,
% 52.61/52.90      (succ(X!1) = n11),
% 52.61/52.90      inference(transitivity,[status(thm)],[6099, 237])).
% 52.61/52.90  tff(6101,plain,
% 52.61/52.90      (pred(X!1) = pred(n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6098])).
% 52.61/52.90  tff(6102,plain,
% 52.61/52.90      (pred(X!1) = n9),
% 52.61/52.90      inference(transitivity,[status(thm)],[6101, 240])).
% 52.61/52.90  tff(6103,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = sum(n9, n11)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6102, 6100])).
% 52.61/52.90  tff(6104,plain,
% 52.61/52.90      (sum(pred(X!1), succ(X!1)) = n20),
% 52.61/52.90      inference(transitivity,[status(thm)],[6103, 236])).
% 52.61/52.90  tff(6105,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n5)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6104, 332])).
% 52.61/52.90  tff(6106,plain,
% 52.61/52.90      (sum(n20, n5) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6105])).
% 52.61/52.90  tff(6107,plain,
% 52.61/52.90      (n4 = sum(n20, n5)),
% 52.61/52.90      inference(symmetry,[status(thm)],[468])).
% 52.61/52.90  tff(6108,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n12, n11)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[330, 6100])).
% 52.61/52.90  tff(6109,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n2),
% 52.61/52.90      inference(transitivity,[status(thm)],[6108, 5627])).
% 52.61/52.90  tff(6110,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n9, n14)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6102, 327])).
% 52.61/52.90  tff(6111,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n2),
% 52.61/52.90      inference(transitivity,[status(thm)],[6110, 1116])).
% 52.61/52.90  tff(6112,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n2, n2)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6111, 6109])).
% 52.61/52.90  tff(6113,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6112, 583, 6107, 6106])).
% 52.61/52.90  tff(6114,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6113])).
% 52.61/52.90  tff(6115,plain,((~(Y!0 = n13)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6116,plain,
% 52.61/52.90      (~(Y!0 = n13)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6115, 24])).
% 52.61/52.90  tff(6117,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[244, 96])).
% 52.61/52.90  tff(6118,plain,
% 52.61/52.90      (sum(n20, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6117])).
% 52.61/52.90  tff(6119,plain,
% 52.61/52.90      (n9 = sum(n20, n10)),
% 52.61/52.90      inference(symmetry,[status(thm)],[3155])).
% 52.61/52.90  tff(6120,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n4, n11)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[94, 239])).
% 52.61/52.90  tff(6121,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.61/52.90      inference(transitivity,[status(thm)],[6120, 1826])).
% 52.61/52.90  tff(6122,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n9, n6)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[242, 91])).
% 52.61/52.90  tff(6123,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.61/52.90      inference(transitivity,[status(thm)],[6122, 2446])).
% 52.61/52.90  tff(6124,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6123, 6121])).
% 52.61/52.90  tff(6125,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6124, 513, 6119, 6118])).
% 52.61/52.90  tff(6126,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6125])).
% 52.61/52.90  tff(6127,plain,((~(Y!0 = n5)) | (~(X!1 = n10))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6128,plain,
% 52.61/52.90      (~(Y!0 = n5)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6127, 235])).
% 52.61/52.90  tff(6129,plain,
% 52.61/52.90      (Y!0 = n9),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[5957, 6128, 5808, 5910, 4898, 24, 5944, 6007, 6116, 324, 298, 275, 259])).
% 52.61/52.90  tff(6130,plain,
% 52.61/52.90      (succ(Y!0) = succ(n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6129])).
% 52.61/52.90  tff(6131,plain,
% 52.61/52.90      (succ(Y!0) = n10),
% 52.61/52.90      inference(transitivity,[status(thm)],[6130, 152])).
% 52.61/52.90  tff(6132,plain,
% 52.61/52.90      (pred(Y!0) = pred(n9)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6129])).
% 52.61/52.90  tff(6133,plain,
% 52.61/52.90      (pred(Y!0) = n8),
% 52.61/52.90      inference(transitivity,[status(thm)],[6132, 156])).
% 52.61/52.90  tff(6134,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = sum(n8, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6133, 6131])).
% 52.61/52.90  tff(6135,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(Y!0)) = n18),
% 52.61/52.90      inference(transitivity,[status(thm)],[6134, 151])).
% 52.61/52.90  tff(6136,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n20, n18)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[244, 6135])).
% 52.61/52.90  tff(6137,plain,
% 52.61/52.90      (sum(n20, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6136])).
% 52.61/52.90  tff(6138,plain,
% 52.61/52.90      (n17 = sum(n20, n18)),
% 52.61/52.90      inference(symmetry,[status(thm)],[2106])).
% 52.61/52.90  tff(6139,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n8, n11)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6133, 239])).
% 52.61/52.90  tff(6140,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.90      inference(transitivity,[status(thm)],[6139, 4930])).
% 52.61/52.90  tff(6141,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n9, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[242, 6131])).
% 52.61/52.90  tff(6142,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.90      inference(transitivity,[status(thm)],[6141, 137])).
% 52.61/52.90  tff(6143,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6142, 6140])).
% 52.61/52.90  tff(6144,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(transitivity,[status(thm)],[6143, 776, 6138, 6137])).
% 52.61/52.90  tff(6145,plain,
% 52.61/52.90      ($false),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[60, 6144])).
% 52.61/52.90  tff(6146,plain,((~(X!1 = n10)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.90  tff(6147,plain,
% 52.61/52.90      (~(X!1 = n10)),
% 52.61/52.90      inference(unit_resolution,[status(thm)],[6146, 24])).
% 52.61/52.90  tff(6148,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n18)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[340, 160])).
% 52.61/52.90  tff(6149,plain,
% 52.61/52.90      (sum(n3, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.90      inference(symmetry,[status(thm)],[6148])).
% 52.61/52.90  tff(6150,plain,
% 52.61/52.90      (n0 = sum(n3, n18)),
% 52.61/52.90      inference(symmetry,[status(thm)],[2291])).
% 52.61/52.90  tff(6151,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = sum(n8, n13)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[158, 335])).
% 52.61/52.90  tff(6152,plain,
% 52.61/52.90      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.90      inference(transitivity,[status(thm)],[6151, 4825])).
% 52.61/52.90  tff(6153,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = sum(n11, n10)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[338, 155])).
% 52.61/52.90  tff(6154,plain,
% 52.61/52.90      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.90      inference(transitivity,[status(thm)],[6153, 4407])).
% 52.61/52.90  tff(6155,plain,
% 52.61/52.90      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.90      inference(monotonicity,[status(thm)],[6154, 6152])).
% 52.61/52.91  tff(6156,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6155, 75, 6150, 6149])).
% 52.61/52.91  tff(6157,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6156])).
% 52.61/52.91  tff(6158,plain,((~(X!1 = n12)) | (~(Y!0 = n9))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6159,plain,
% 52.61/52.91      (~(X!1 = n12)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6158, 153])).
% 52.61/52.91  tff(6160,plain,
% 52.61/52.91      (X!1 = n11),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5280, 6159, 5777, 24, 5910, 5976, 6085, 6147, 234, 219, 203, 185])).
% 52.61/52.91  tff(6161,plain,
% 52.61/52.91      (succ(X!1) = succ(n11)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6160])).
% 52.61/52.91  tff(6162,plain,
% 52.61/52.91      (succ(X!1) = n12),
% 52.61/52.91      inference(transitivity,[status(thm)],[6161, 162])).
% 52.61/52.91  tff(6163,plain,
% 52.61/52.91      (pred(X!1) = pred(n11)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6160])).
% 52.61/52.91  tff(6164,plain,
% 52.61/52.91      (pred(X!1) = n10),
% 52.61/52.91      inference(transitivity,[status(thm)],[6163, 429])).
% 52.61/52.91  tff(6165,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = sum(n10, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6164, 6162])).
% 52.61/52.91  tff(6166,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = n1),
% 52.61/52.91      inference(transitivity,[status(thm)],[6165, 161])).
% 52.61/52.91  tff(6167,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n18)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6166, 160])).
% 52.61/52.91  tff(6168,plain,
% 52.61/52.91      (sum(n1, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6167])).
% 52.61/52.91  tff(6169,plain,
% 52.61/52.91      (n19 = sum(n1, n18)),
% 52.61/52.91      inference(symmetry,[status(thm)],[1845])).
% 52.61/52.91  tff(6170,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n8, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[158, 6162])).
% 52.61/52.91  tff(6171,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.91      inference(transitivity,[status(thm)],[6170, 2878])).
% 52.61/52.91  tff(6172,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n10, n10)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6164, 155])).
% 52.61/52.91  tff(6173,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.91      inference(transitivity,[status(thm)],[6172, 1358])).
% 52.61/52.91  tff(6174,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6173, 6171])).
% 52.61/52.91  tff(6175,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6174, 139, 6169, 6168])).
% 52.61/52.91  tff(6176,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6175])).
% 52.61/52.91  tff(6177,plain,((~(Y!0 = n9)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6178,plain,
% 52.61/52.91      (~(Y!0 = n9)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6177, 24])).
% 52.61/52.91  tff(6179,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[433, 21])).
% 52.61/52.91  tff(6180,plain,
% 52.61/52.91      (sum(n1, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6179])).
% 52.61/52.91  tff(6181,plain,
% 52.61/52.91      (n10 = sum(n1, n9)),
% 52.61/52.91      inference(symmetry,[status(thm)],[4632])).
% 52.61/52.91  tff(6182,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n14, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[19, 428])).
% 52.61/52.91  tff(6183,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.91      inference(transitivity,[status(thm)],[6182, 49])).
% 52.61/52.91  tff(6184,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n10, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[431, 16])).
% 52.61/52.91  tff(6185,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.91      inference(transitivity,[status(thm)],[6184, 1915])).
% 52.61/52.91  tff(6186,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6185, 6183])).
% 52.61/52.91  tff(6187,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6186, 313, 6181, 6180])).
% 52.61/52.91  tff(6188,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6187])).
% 52.61/52.91  tff(6189,plain,((~(Y!0 = n15)) | (~(X!1 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6190,plain,
% 52.61/52.91      (~(Y!0 = n15)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6189, 426])).
% 52.61/52.91  tff(6191,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[433, 283])).
% 52.61/52.91  tff(6192,plain,
% 52.61/52.91      (sum(n1, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6191])).
% 52.61/52.91  tff(6193,plain,
% 52.61/52.91      (n8 = sum(n1, n7)),
% 52.61/52.91      inference(symmetry,[status(thm)],[1764])).
% 52.61/52.91  tff(6194,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n13, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[281, 428])).
% 52.61/52.91  tff(6195,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n4),
% 52.61/52.91      inference(transitivity,[status(thm)],[6194, 2159])).
% 52.61/52.91  tff(6196,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n10, n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[431, 278])).
% 52.61/52.91  tff(6197,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n4),
% 52.61/52.91      inference(transitivity,[status(thm)],[6196, 2944])).
% 52.61/52.91  tff(6198,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n4, n4)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6197, 6195])).
% 52.61/52.91  tff(6199,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6198, 264, 6193, 6192])).
% 52.61/52.91  tff(6200,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6199])).
% 52.61/52.91  tff(6201,plain,((~(Y!0 = n14)) | (~(X!1 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6202,plain,
% 52.61/52.91      (~(Y!0 = n14)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6201, 426])).
% 52.61/52.91  tff(6203,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[433, 34])).
% 52.61/52.91  tff(6204,plain,
% 52.61/52.91      (sum(n1, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6203])).
% 52.61/52.91  tff(6205,plain,
% 52.61/52.91      (n13 = sum(n1, n12)),
% 52.61/52.91      inference(symmetry,[status(thm)],[839])).
% 52.61/52.91  tff(6206,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n5, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[32, 428])).
% 52.61/52.91  tff(6207,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.61/52.91      inference(transitivity,[status(thm)],[6206, 2840])).
% 52.61/52.91  tff(6208,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n10, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[431, 29])).
% 52.61/52.91  tff(6209,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.61/52.91      inference(transitivity,[status(thm)],[6208, 2837])).
% 52.61/52.91  tff(6210,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6209, 6207])).
% 52.61/52.91  tff(6211,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6210, 358, 6205, 6204])).
% 52.61/52.91  tff(6212,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6211])).
% 52.61/52.91  tff(6213,plain,((~(Y!0 = n6)) | (~(X!1 = n11))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6214,plain,
% 52.61/52.91      (~(Y!0 = n6)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6213, 426])).
% 52.61/52.91  tff(6215,plain,
% 52.61/52.91      (Y!0 = n5),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5759, 6214, 4748, 4747, 4739, 4740, 4741, 6202, 6190])).
% 52.61/52.91  tff(6216,plain,
% 52.61/52.91      (succ(Y!0) = succ(n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6215])).
% 52.61/52.91  tff(6217,plain,
% 52.61/52.91      (succ(Y!0) = n6),
% 52.61/52.91      inference(transitivity,[status(thm)],[6216, 88])).
% 52.61/52.91  tff(6218,plain,
% 52.61/52.91      (pred(Y!0) = pred(n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6215])).
% 52.61/52.91  tff(6219,plain,
% 52.61/52.91      (pred(Y!0) = n4),
% 52.61/52.91      inference(transitivity,[status(thm)],[6218, 92])).
% 52.61/52.91  tff(6220,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = sum(n4, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6219, 6217])).
% 52.61/52.91  tff(6221,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = n10),
% 52.61/52.91      inference(transitivity,[status(thm)],[6220, 87])).
% 52.61/52.91  tff(6222,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n1, n10)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[433, 6221])).
% 52.61/52.91  tff(6223,plain,
% 52.61/52.91      (sum(n1, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6222])).
% 52.61/52.91  tff(6224,plain,
% 52.61/52.91      (n11 = sum(n1, n10)),
% 52.61/52.91      inference(symmetry,[status(thm)],[809])).
% 52.61/52.91  tff(6225,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n4, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6219, 428])).
% 52.61/52.91  tff(6226,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n16),
% 52.61/52.91      inference(transitivity,[status(thm)],[6225, 1759])).
% 52.61/52.91  tff(6227,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n10, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[431, 6217])).
% 52.61/52.91  tff(6228,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n16),
% 52.61/52.91      inference(transitivity,[status(thm)],[6227, 2323])).
% 52.61/52.91  tff(6229,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n16, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6228, 6226])).
% 52.61/52.91  tff(6230,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6229, 208, 6224, 6223])).
% 52.61/52.91  tff(6231,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6230])).
% 52.61/52.91  tff(6232,plain,((~(X!1 = n11)) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0) | (Y!0 = n13) | (Y!0 = n9)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6233,plain,
% 52.61/52.91      (~(X!1 = n11)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6232, 5808, 5944, 6007, 6116, 6178])).
% 52.61/52.91  tff(6234,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n10)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[170, 96])).
% 52.61/52.91  tff(6235,plain,
% 52.61/52.91      (sum(n8, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6234])).
% 52.61/52.91  tff(6236,plain,
% 52.61/52.91      (n18 = sum(n8, n10)),
% 52.61/52.91      inference(symmetry,[status(thm)],[151])).
% 52.61/52.91  tff(6237,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n4, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[94, 165])).
% 52.61/52.91  tff(6238,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.91      inference(transitivity,[status(thm)],[6237, 1720])).
% 52.61/52.91  tff(6239,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n3, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[168, 91])).
% 52.61/52.91  tff(6240,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.91      inference(transitivity,[status(thm)],[6239, 2409])).
% 52.61/52.91  tff(6241,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6240, 6238])).
% 52.61/52.91  tff(6242,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6241, 1315, 6236, 6235])).
% 52.61/52.91  tff(6243,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6242])).
% 52.61/52.91  tff(6244,plain,((~(X!1 = n4)) | (~(Y!0 = n5))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6245,plain,
% 52.61/52.91      (~(X!1 = n4)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6244, 89])).
% 52.61/52.91  tff(6246,plain,
% 52.61/52.91      (X!1 = n12),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5280, 6245, 5777, 24, 5910, 5976, 6085, 6147, 6233, 150, 134, 118])).
% 52.61/52.91  tff(6247,plain,
% 52.61/52.91      (succ(X!1) = succ(n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6246])).
% 52.61/52.91  tff(6248,plain,
% 52.61/52.91      (succ(X!1) = n13),
% 52.61/52.91      inference(transitivity,[status(thm)],[6247, 98])).
% 52.61/52.91  tff(6249,plain,
% 52.61/52.91      (pred(X!1) = pred(n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6246])).
% 52.61/52.91  tff(6250,plain,
% 52.61/52.91      (pred(X!1) = n11),
% 52.61/52.91      inference(transitivity,[status(thm)],[6249, 336])).
% 52.61/52.91  tff(6251,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = sum(n11, n13)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6250, 6248])).
% 52.61/52.91  tff(6252,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = n3),
% 52.61/52.91      inference(transitivity,[status(thm)],[6251, 97])).
% 52.61/52.91  tff(6253,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n10)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6252, 96])).
% 52.61/52.91  tff(6254,plain,
% 52.61/52.91      (sum(n3, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6253])).
% 52.61/52.91  tff(6255,plain,
% 52.61/52.91      (n13 = sum(n3, n10)),
% 52.61/52.91      inference(symmetry,[status(thm)],[178])).
% 52.61/52.91  tff(6256,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n4, n13)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[94, 6248])).
% 52.61/52.91  tff(6257,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n17),
% 52.61/52.91      inference(transitivity,[status(thm)],[6256, 1840])).
% 52.61/52.91  tff(6258,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n11, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6250, 91])).
% 52.61/52.91  tff(6259,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n17),
% 52.61/52.91      inference(transitivity,[status(thm)],[6258, 2472])).
% 52.61/52.91  tff(6260,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n17, n17)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6259, 6257])).
% 52.61/52.91  tff(6261,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6260, 358, 6255, 6254])).
% 52.61/52.91  tff(6262,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6261])).
% 52.61/52.91  tff(6263,plain,((~(Y!0 = n5)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6264,plain,
% 52.61/52.91      (~(Y!0 = n5)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6263, 24])).
% 52.61/52.91  tff(6265,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[340, 283])).
% 52.61/52.91  tff(6266,plain,
% 52.61/52.91      (sum(n3, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6265])).
% 52.61/52.91  tff(6267,plain,
% 52.61/52.91      (n10 = sum(n3, n7)),
% 52.61/52.91      inference(symmetry,[status(thm)],[5053])).
% 52.61/52.91  tff(6268,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n13, n13)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[281, 335])).
% 52.61/52.91  tff(6269,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n5),
% 52.61/52.91      inference(transitivity,[status(thm)],[6268, 51])).
% 52.61/52.91  tff(6270,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n11, n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[338, 278])).
% 52.61/52.91  tff(6271,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n5),
% 52.61/52.91      inference(transitivity,[status(thm)],[6270, 4608])).
% 52.61/52.91  tff(6272,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n5, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6271, 6269])).
% 52.61/52.91  tff(6273,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6272, 313, 6267, 6266])).
% 52.61/52.91  tff(6274,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6273])).
% 52.61/52.91  tff(6275,plain,((~(Y!0 = n14)) | (~(X!1 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6276,plain,
% 52.61/52.91      (~(Y!0 = n14)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6275, 333])).
% 52.61/52.91  tff(6277,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[340, 21])).
% 52.61/52.91  tff(6278,plain,
% 52.61/52.91      (sum(n3, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6277])).
% 52.61/52.91  tff(6279,plain,
% 52.61/52.91      (n12 = sum(n3, n9)),
% 52.61/52.91      inference(symmetry,[status(thm)],[1905])).
% 52.61/52.91  tff(6280,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n14, n13)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[19, 335])).
% 52.61/52.91  tff(6281,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.61/52.91      inference(transitivity,[status(thm)],[6280, 4869])).
% 52.61/52.91  tff(6282,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n11, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[338, 16])).
% 52.61/52.91  tff(6283,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.61/52.91      inference(transitivity,[status(thm)],[6282, 4543])).
% 52.61/52.91  tff(6284,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6283, 6281])).
% 52.61/52.91  tff(6285,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6284, 127, 6279, 6278])).
% 52.61/52.91  tff(6286,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6285])).
% 52.61/52.91  tff(6287,plain,((~(Y!0 = n15)) | (~(X!1 = n12))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6288,plain,
% 52.61/52.91      (~(Y!0 = n15)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6287, 333])).
% 52.61/52.91  tff(6289,plain,
% 52.61/52.91      (Y!0 = n6),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5759, 6288, 4748, 4747, 4739, 4740, 4741, 4742, 6276])).
% 52.61/52.91  tff(6290,plain,
% 52.61/52.91      (succ(Y!0) = succ(n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6289])).
% 52.61/52.91  tff(6291,plain,
% 52.61/52.91      (succ(Y!0) = n7),
% 52.61/52.91      inference(transitivity,[status(thm)],[6290, 26])).
% 52.61/52.91  tff(6292,plain,
% 52.61/52.91      (pred(Y!0) = pred(n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6289])).
% 52.61/52.91  tff(6293,plain,
% 52.61/52.91      (pred(Y!0) = n5),
% 52.61/52.91      inference(transitivity,[status(thm)],[6292, 30])).
% 52.61/52.91  tff(6294,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = sum(n5, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6293, 6291])).
% 52.61/52.91  tff(6295,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = n12),
% 52.61/52.91      inference(transitivity,[status(thm)],[6294, 25])).
% 52.61/52.91  tff(6296,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n3, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[340, 6295])).
% 52.61/52.91  tff(6297,plain,
% 52.61/52.91      (sum(n3, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6296])).
% 52.61/52.91  tff(6298,plain,
% 52.61/52.91      (n15 = sum(n3, n12)),
% 52.61/52.91      inference(symmetry,[status(thm)],[2813])).
% 52.61/52.91  tff(6299,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n5, n13)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6293, 335])).
% 52.61/52.91  tff(6300,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.61/52.91      inference(transitivity,[status(thm)],[6299, 5475])).
% 52.61/52.91  tff(6301,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n11, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[338, 6291])).
% 52.61/52.91  tff(6302,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.61/52.91      inference(transitivity,[status(thm)],[6301, 4457])).
% 52.61/52.91  tff(6303,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6302, 6300])).
% 52.61/52.91  tff(6304,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6303, 374, 6298, 6297])).
% 52.61/52.91  tff(6305,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6304])).
% 52.61/52.91  tff(6306,plain,((~(X!1 = n12)) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0) | (Y!0 = n13) | (Y!0 = n9) | (Y!0 = n5)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6307,plain,
% 52.61/52.91      (~(X!1 = n12)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6306, 5808, 5944, 6007, 6116, 6178, 6264])).
% 52.61/52.91  tff(6308,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[187, 34])).
% 52.61/52.91  tff(6309,plain,
% 52.61/52.91      (sum(n10, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6308])).
% 52.61/52.91  tff(6310,plain,
% 52.61/52.91      (n1 = sum(n10, n12)),
% 52.61/52.91      inference(symmetry,[status(thm)],[161])).
% 52.61/52.91  tff(6311,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n5, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[32, 101])).
% 52.61/52.91  tff(6312,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n11),
% 52.61/52.91      inference(transitivity,[status(thm)],[6311, 988])).
% 52.61/52.91  tff(6313,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n4, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[111, 29])).
% 52.61/52.91  tff(6314,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n11),
% 52.61/52.91      inference(transitivity,[status(thm)],[6313, 985])).
% 52.61/52.91  tff(6315,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n11, n11)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6314, 6312])).
% 52.61/52.91  tff(6316,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6315, 438, 6310, 6309])).
% 52.61/52.91  tff(6317,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6316])).
% 52.61/52.91  tff(6318,plain,((~(X!1 = n5)) | (~(Y!0 = n6))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6319,plain,
% 52.61/52.91      (~(X!1 = n5)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6318, 27])).
% 52.61/52.91  tff(6320,plain,
% 52.61/52.91      (X!1 = n4),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5280, 6319, 5777, 24, 5910, 5976, 6085, 6147, 6233, 6307, 86, 63])).
% 52.61/52.91  tff(6321,plain,
% 52.61/52.91      (succ(X!1) = succ(n4)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6320])).
% 52.61/52.91  tff(6322,plain,
% 52.61/52.91      (succ(X!1) = n5),
% 52.61/52.91      inference(transitivity,[status(thm)],[6321, 36])).
% 52.61/52.91  tff(6323,plain,
% 52.61/52.91      (pred(X!1) = pred(n4)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6320])).
% 52.61/52.91  tff(6324,plain,
% 52.61/52.91      (pred(X!1) = n3),
% 52.61/52.91      inference(transitivity,[status(thm)],[6323, 166])).
% 52.61/52.91  tff(6325,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = sum(n3, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6324, 6322])).
% 52.61/52.91  tff(6326,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = n8),
% 52.61/52.91      inference(transitivity,[status(thm)],[6325, 35])).
% 52.61/52.91  tff(6327,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n12)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6326, 34])).
% 52.61/52.91  tff(6328,plain,
% 52.61/52.91      (sum(n8, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6327])).
% 52.61/52.91  tff(6329,plain,
% 52.61/52.91      (n20 = sum(n8, n12)),
% 52.61/52.91      inference(symmetry,[status(thm)],[2878])).
% 52.61/52.91  tff(6330,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n5, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[32, 6322])).
% 52.61/52.91  tff(6331,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n10),
% 52.61/52.91      inference(transitivity,[status(thm)],[6330, 313])).
% 52.61/52.91  tff(6332,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n3, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6324, 29])).
% 52.61/52.91  tff(6333,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n10),
% 52.61/52.91      inference(transitivity,[status(thm)],[6332, 5053])).
% 52.61/52.91  tff(6334,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n10, n10)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6333, 6331])).
% 52.61/52.91  tff(6335,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6334, 1358, 6329, 6328])).
% 52.61/52.91  tff(6336,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6335])).
% 52.61/52.91  tff(6337,plain,((~(Y!0 = n6)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6338,plain,
% 52.61/52.91      (~(Y!0 = n6)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6337, 24])).
% 52.61/52.91  tff(6339,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n14, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[19, 66])).
% 52.61/52.91  tff(6340,plain,
% 52.61/52.91      (pred(n15) = pred(Y!0)),
% 52.61/52.91      inference(symmetry,[status(thm)],[18])).
% 52.61/52.91  tff(6341,plain,
% 52.61/52.91      (pred(X!1) = pred(Y!0)),
% 52.61/52.91      inference(transitivity,[status(thm)],[67, 6340])).
% 52.61/52.91  tff(6342,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = sum(pred(Y!0), succ(X!1))),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6341])).
% 52.61/52.91  tff(6343,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = n9),
% 52.61/52.91      inference(transitivity,[status(thm)],[6342, 6339, 12])).
% 52.61/52.91  tff(6344,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6343, 21])).
% 52.61/52.91  tff(6345,plain,
% 52.61/52.91      (sum(n9, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6344])).
% 52.61/52.91  tff(6346,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n9),
% 52.61/52.91      inference(transitivity,[status(thm)],[6339, 12])).
% 52.61/52.91  tff(6347,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n14, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[68, 16])).
% 52.61/52.91  tff(6348,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n9),
% 52.61/52.91      inference(transitivity,[status(thm)],[6347, 12])).
% 52.61/52.91  tff(6349,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n9, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6348, 6346])).
% 52.61/52.91  tff(6350,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6349, 6345])).
% 52.61/52.91  tff(6351,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6350])).
% 52.61/52.91  tff(6352,plain,((~(X!1 = n15)) | (~(Y!0 = n15))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6353,plain,
% 52.61/52.91      (~(X!1 = n15)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6352, 14])).
% 52.61/52.91  tff(6354,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[170, 283])).
% 52.61/52.91  tff(6355,plain,
% 52.61/52.91      (sum(n8, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6354])).
% 52.61/52.91  tff(6356,plain,
% 52.61/52.91      (n15 = sum(n8, n7)),
% 52.61/52.91      inference(symmetry,[status(thm)],[970])).
% 52.61/52.91  tff(6357,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n13, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[281, 165])).
% 52.61/52.91  tff(6358,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.61/52.91      inference(transitivity,[status(thm)],[6357, 2119])).
% 52.61/52.91  tff(6359,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n3, n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[168, 278])).
% 52.61/52.91  tff(6360,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.61/52.91      inference(transitivity,[status(thm)],[6359, 5243])).
% 52.61/52.91  tff(6361,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6360, 6358])).
% 52.61/52.91  tff(6362,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6361, 374, 6356, 6355])).
% 52.61/52.91  tff(6363,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6362])).
% 52.61/52.91  tff(6364,plain,((~(Y!0 = n14)) | (~(X!1 = n4))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6365,plain,
% 52.61/52.91      (~(Y!0 = n14)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6364, 163])).
% 52.61/52.91  tff(6366,plain,
% 52.61/52.91      (Y!0 = n15),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5759, 6365, 4748, 4747, 4739, 4740, 4741, 4742, 4743])).
% 52.61/52.91  tff(6367,plain,
% 52.61/52.91      (succ(Y!0) = succ(n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6366])).
% 52.61/52.91  tff(6368,plain,
% 52.61/52.91      (succ(Y!0) = n16),
% 52.61/52.91      inference(transitivity,[status(thm)],[6367, 13])).
% 52.61/52.91  tff(6369,plain,
% 52.61/52.91      (pred(Y!0) = pred(n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6366])).
% 52.61/52.91  tff(6370,plain,
% 52.61/52.91      (pred(Y!0) = n14),
% 52.61/52.91      inference(transitivity,[status(thm)],[6369, 17])).
% 52.61/52.91  tff(6371,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = sum(n14, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6370, 6368])).
% 52.61/52.91  tff(6372,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = n9),
% 52.61/52.91      inference(transitivity,[status(thm)],[6371, 12])).
% 52.61/52.91  tff(6373,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n8, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[170, 6372])).
% 52.61/52.91  tff(6374,plain,
% 52.61/52.91      (sum(n8, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6373])).
% 52.61/52.91  tff(6375,plain,
% 52.61/52.91      (n17 = sum(n8, n9)),
% 52.61/52.91      inference(symmetry,[status(thm)],[539])).
% 52.61/52.91  tff(6376,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n14, n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6370, 165])).
% 52.61/52.91  tff(6377,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.91      inference(transitivity,[status(thm)],[6376, 388])).
% 52.61/52.91  tff(6378,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n3, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[168, 6368])).
% 52.61/52.91  tff(6379,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.91      inference(transitivity,[status(thm)],[6378, 2006])).
% 52.61/52.91  tff(6380,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6379, 6377])).
% 52.61/52.91  tff(6381,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6380, 776, 6375, 6374])).
% 52.61/52.91  tff(6382,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6381])).
% 52.61/52.91  tff(6383,plain,((~(X!1 = n4)) | (Y!0 = n2) | (Y!0 = n1) | (Y!0 = n0) | (Y!0 = n13) | (Y!0 = n9) | (Y!0 = n5) | (Y!0 = n6)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6384,plain,
% 52.61/52.91      (~(X!1 = n4)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6383, 5808, 5944, 6007, 6116, 6178, 6264, 6338])).
% 52.61/52.91  tff(6385,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[46, 21])).
% 52.61/52.91  tff(6386,plain,
% 52.61/52.91      (sum(n14, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6385])).
% 52.61/52.91  tff(6387,plain,
% 52.61/52.91      (n2 = sum(n14, n9)),
% 52.61/52.91      inference(symmetry,[status(thm)],[584])).
% 52.61/52.91  tff(6388,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n14, n8)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[19, 41])).
% 52.61/52.91  tff(6389,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.61/52.91      inference(transitivity,[status(thm)],[6388, 1121])).
% 52.61/52.91  tff(6390,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n6, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[44, 16])).
% 52.61/52.91  tff(6391,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.61/52.91      inference(transitivity,[status(thm)],[6390, 1118])).
% 52.61/52.91  tff(6392,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6391, 6389])).
% 52.61/52.91  tff(6393,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6392, 599, 6387, 6386])).
% 52.61/52.91  tff(6394,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6393])).
% 52.61/52.91  tff(6395,plain,((~(X!1 = n7)) | (~(Y!0 = n15))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6396,plain,
% 52.61/52.91      (~(X!1 = n7)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6395, 14])).
% 52.61/52.91  tff(6397,plain,
% 52.61/52.91      (X!1 = n5),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5280, 6396, 5777, 24, 5910, 5976, 6085, 6147, 6233, 6307, 6384, 6353])).
% 52.61/52.91  tff(6398,plain,
% 52.61/52.91      (succ(X!1) = succ(n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6397])).
% 52.61/52.91  tff(6399,plain,
% 52.61/52.91      (succ(X!1) = n6),
% 52.61/52.91      inference(transitivity,[status(thm)],[6398, 88])).
% 52.61/52.91  tff(6400,plain,
% 52.61/52.91      (pred(X!1) = pred(n5)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6397])).
% 52.61/52.91  tff(6401,plain,
% 52.61/52.91      (pred(X!1) = n4),
% 52.61/52.91      inference(transitivity,[status(thm)],[6400, 92])).
% 52.61/52.91  tff(6402,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = sum(n4, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6401, 6399])).
% 52.61/52.91  tff(6403,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = n10),
% 52.61/52.91      inference(transitivity,[status(thm)],[6402, 87])).
% 52.61/52.91  tff(6404,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n9)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6403, 21])).
% 52.61/52.91  tff(6405,plain,
% 52.61/52.91      (sum(n10, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6404])).
% 52.61/52.91  tff(6406,plain,
% 52.61/52.91      (n19 = sum(n10, n9)),
% 52.61/52.91      inference(symmetry,[status(thm)],[1996])).
% 52.61/52.91  tff(6407,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n14, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[19, 6399])).
% 52.61/52.91  tff(6408,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n20),
% 52.61/52.91      inference(transitivity,[status(thm)],[6407, 143])).
% 52.61/52.91  tff(6409,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n4, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6401, 16])).
% 52.61/52.91  tff(6410,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n20),
% 52.61/52.91      inference(transitivity,[status(thm)],[6409, 140])).
% 52.61/52.91  tff(6411,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n20, n20)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6410, 6408])).
% 52.61/52.91  tff(6412,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6411, 139, 6406, 6405])).
% 52.61/52.91  tff(6413,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6412])).
% 52.61/52.91  tff(6414,plain,((~(Y!0 = n15)) | (X!1 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6415,plain,
% 52.61/52.91      (~(Y!0 = n15)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6414, 24])).
% 52.61/52.91  tff(6416,plain,
% 52.61/52.91      (Y!0 = n14),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5759, 6415, 5808, 5944, 6007, 6116, 6178, 6264, 6338])).
% 52.61/52.91  tff(6417,plain,
% 52.61/52.91      (succ(Y!0) = succ(n14)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6416])).
% 52.61/52.91  tff(6418,plain,
% 52.61/52.91      (succ(Y!0) = n15),
% 52.61/52.91      inference(transitivity,[status(thm)],[6417, 11])).
% 52.61/52.91  tff(6419,plain,
% 52.61/52.91      (pred(Y!0) = pred(n14)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6416])).
% 52.61/52.91  tff(6420,plain,
% 52.61/52.91      (pred(Y!0) = n13),
% 52.61/52.91      inference(transitivity,[status(thm)],[6419, 279])).
% 52.61/52.91  tff(6421,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = sum(n13, n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6420, 6418])).
% 52.61/52.91  tff(6422,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(Y!0)) = n7),
% 52.61/52.91      inference(transitivity,[status(thm)],[6421, 10])).
% 52.61/52.91  tff(6423,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n10, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[187, 283])).
% 52.61/52.91  tff(6424,plain,
% 52.61/52.91      (sum(n10, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6423])).
% 52.61/52.91  tff(6425,plain,
% 52.61/52.91      (n17 = sum(n10, n7)),
% 52.61/52.91      inference(symmetry,[status(thm)],[2837])).
% 52.61/52.91  tff(6426,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n13, n6)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[281, 101])).
% 52.61/52.91  tff(6427,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.91      inference(transitivity,[status(thm)],[6426, 2459])).
% 52.61/52.91  tff(6428,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n4, n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[111, 278])).
% 52.61/52.91  tff(6429,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.91      inference(transitivity,[status(thm)],[6428, 1879])).
% 52.61/52.91  tff(6430,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6429, 6427])).
% 52.61/52.91  tff(6431,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6430, 776, 6425, 6424])).
% 52.61/52.91  tff(6432,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6431])).
% 52.61/52.91  tff(6433,plain,((~(X!1 = n5)) | (~(Y!0 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6434,plain,
% 52.61/52.91      (~(X!1 = n5)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6433, 6416])).
% 52.61/52.91  tff(6435,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n9, n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[70, 283])).
% 52.61/52.91  tff(6436,plain,
% 52.61/52.91      (sum(n9, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(symmetry,[status(thm)],[6435])).
% 52.61/52.91  tff(6437,plain,
% 52.61/52.91      (n16 = sum(n9, n7)),
% 52.61/52.91      inference(symmetry,[status(thm)],[252])).
% 52.61/52.91  tff(6438,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = sum(n13, n16)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[281, 66])).
% 52.61/52.91  tff(6439,plain,
% 52.61/52.91      (sum(pred(Y!0), succ(X!1)) = n8),
% 52.61/52.91      inference(transitivity,[status(thm)],[6438, 2276])).
% 52.61/52.91  tff(6440,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = sum(n14, n15)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[68, 278])).
% 52.61/52.91  tff(6441,plain,
% 52.61/52.91      (sum(pred(X!1), succ(Y!0)) = n8),
% 52.61/52.91      inference(transitivity,[status(thm)],[6440, 5182])).
% 52.61/52.91  tff(6442,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n8, n8)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6441, 6439])).
% 52.61/52.91  tff(6443,plain,
% 52.61/52.91      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.91      inference(transitivity,[status(thm)],[6442, 209, 6437, 6436])).
% 52.61/52.91  tff(6444,plain,
% 52.61/52.91      ($false),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[60, 6443])).
% 52.61/52.91  tff(6445,plain,((~(X!1 = n15)) | (~(Y!0 = n14))), inference(lemma,lemma(discharge,[]))).
% 52.61/52.91  tff(6446,plain,
% 52.61/52.91      (~(X!1 = n15)),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[6445, 6416])).
% 52.61/52.91  tff(6447,plain,
% 52.61/52.91      (X!1 = n7),
% 52.61/52.91      inference(unit_resolution,[status(thm)],[5280, 6446, 5777, 24, 5910, 5976, 6085, 6147, 6233, 6307, 6384, 6434])).
% 52.61/52.91  tff(6448,plain,
% 52.61/52.91      (succ(X!1) = succ(n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6447])).
% 52.61/52.91  tff(6449,plain,
% 52.61/52.91      (succ(X!1) = n8),
% 52.61/52.91      inference(transitivity,[status(thm)],[6448, 38])).
% 52.61/52.91  tff(6450,plain,
% 52.61/52.91      (pred(X!1) = pred(n7)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6447])).
% 52.61/52.91  tff(6451,plain,
% 52.61/52.91      (pred(X!1) = n6),
% 52.61/52.91      inference(transitivity,[status(thm)],[6450, 42])).
% 52.61/52.91  tff(6452,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = sum(n6, n8)),
% 52.61/52.91      inference(monotonicity,[status(thm)],[6451, 6449])).
% 52.61/52.91  tff(6453,plain,
% 52.61/52.91      (sum(pred(X!1), succ(X!1)) = n14),
% 52.61/52.91      inference(transitivity,[status(thm)],[6452, 37])).
% 52.61/52.92  tff(6454,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n14, n7)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6453, 6422])).
% 52.61/52.92  tff(6455,plain,
% 52.61/52.92      (sum(n14, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(symmetry,[status(thm)],[6454])).
% 52.61/52.92  tff(6456,plain,
% 52.61/52.92      (n0 = sum(n14, n7)),
% 52.61/52.92      inference(symmetry,[status(thm)],[79])).
% 52.61/52.92  tff(6457,plain,
% 52.61/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n13, n8)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6420, 6449])).
% 52.61/52.92  tff(6458,plain,
% 52.61/52.92      (sum(pred(Y!0), succ(X!1)) = n0),
% 52.61/52.92      inference(transitivity,[status(thm)],[6457, 1179])).
% 52.61/52.92  tff(6459,plain,
% 52.61/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n6, n15)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6451, 6418])).
% 52.61/52.92  tff(6460,plain,
% 52.61/52.92      (sum(pred(X!1), succ(Y!0)) = n0),
% 52.61/52.92      inference(transitivity,[status(thm)],[6459, 1176])).
% 52.61/52.92  tff(6461,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n0, n0)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6460, 6458])).
% 52.61/52.92  tff(6462,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(transitivity,[status(thm)],[6461, 75, 6456, 6455])).
% 52.61/52.92  tff(6463,plain,
% 52.61/52.92      ($false),
% 52.61/52.92      inference(unit_resolution,[status(thm)],[60, 6462])).
% 52.61/52.92  tff(6464,plain,(X!1 = n13), inference(lemma,lemma(discharge,[]))).
% 52.61/52.92  tff(6465,plain,
% 52.61/52.92      (succ(X!1) = succ(n13)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6464])).
% 52.61/52.92  tff(6466,plain,
% 52.61/52.92      (succ(X!1) = n14),
% 52.61/52.92      inference(transitivity,[status(thm)],[6465, 23])).
% 52.61/52.92  tff(6467,plain,
% 52.61/52.92      (pred(X!1) = pred(n13)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6464])).
% 52.61/52.92  tff(6468,plain,
% 52.61/52.92      (pred(X!1) = n12),
% 52.61/52.92      inference(transitivity,[status(thm)],[6467, 328])).
% 52.61/52.92  tff(6469,plain,
% 52.61/52.92      (sum(pred(X!1), succ(X!1)) = sum(n12, n14)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6468, 6466])).
% 52.61/52.92  tff(6470,plain,
% 52.61/52.92      (sum(pred(X!1), succ(X!1)) = n5),
% 52.61/52.92      inference(transitivity,[status(thm)],[6469, 22])).
% 52.61/52.92  tff(6471,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n9)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6470, 21])).
% 52.61/52.92  tff(6472,plain,
% 52.61/52.92      (sum(n5, n9) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(symmetry,[status(thm)],[6471])).
% 52.61/52.92  tff(6473,plain,
% 52.61/52.92      (n14 = sum(n5, n9)),
% 52.61/52.92      inference(symmetry,[status(thm)],[569])).
% 52.61/52.92  tff(6474,plain,
% 52.61/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n14, n14)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[19, 6466])).
% 52.61/52.92  tff(6475,plain,
% 52.61/52.92      (sum(pred(Y!0), succ(X!1)) = n7),
% 52.61/52.92      inference(transitivity,[status(thm)],[6474, 192])).
% 52.61/52.92  tff(6476,plain,
% 52.61/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n16)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6468, 16])).
% 52.61/52.92  tff(6477,plain,
% 52.61/52.92      (sum(pred(X!1), succ(Y!0)) = n7),
% 52.61/52.92      inference(transitivity,[status(thm)],[6476, 406])).
% 52.61/52.92  tff(6478,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n7, n7)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6477, 6475])).
% 52.61/52.92  tff(6479,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(transitivity,[status(thm)],[6478, 405, 6473, 6472])).
% 52.61/52.92  tff(6480,plain,
% 52.61/52.92      ($false),
% 52.61/52.92      inference(unit_resolution,[status(thm)],[60, 6479])).
% 52.61/52.92  tff(6481,plain,(~(Y!0 = n15)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.92  tff(6482,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n12)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6470, 34])).
% 52.61/52.92  tff(6483,plain,
% 52.61/52.92      (sum(n5, n12) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(symmetry,[status(thm)],[6482])).
% 52.61/52.92  tff(6484,plain,
% 52.61/52.92      (n17 = sum(n5, n12)),
% 52.61/52.92      inference(symmetry,[status(thm)],[2840])).
% 52.61/52.92  tff(6485,plain,
% 52.61/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n5, n14)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[32, 6466])).
% 52.61/52.92  tff(6486,plain,
% 52.61/52.92      (sum(pred(Y!0), succ(X!1)) = n19),
% 52.61/52.92      inference(transitivity,[status(thm)],[6485, 958])).
% 52.61/52.92  tff(6487,plain,
% 52.61/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n7)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6468, 29])).
% 52.61/52.92  tff(6488,plain,
% 52.61/52.92      (sum(pred(X!1), succ(Y!0)) = n19),
% 52.61/52.92      inference(transitivity,[status(thm)],[6487, 955])).
% 52.61/52.92  tff(6489,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n19, n19)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6488, 6486])).
% 52.61/52.92  tff(6490,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(transitivity,[status(thm)],[6489, 776, 6484, 6483])).
% 52.61/52.92  tff(6491,plain,
% 52.61/52.92      ($false),
% 52.61/52.92      inference(unit_resolution,[status(thm)],[60, 6490])).
% 52.61/52.92  tff(6492,plain,(~(Y!0 = n6)), inference(lemma,lemma(discharge,[]))).
% 52.61/52.92  tff(6493,plain,
% 52.61/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n10)),
% 52.61/52.92      inference(monotonicity,[status(thm)],[6470, 96])).
% 52.61/52.92  tff(6494,plain,
% 52.61/52.92      (sum(n5, n10) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.61/52.92      inference(symmetry,[status(thm)],[6493])).
% 52.61/52.92  tff(6495,plain,
% 52.61/52.92      (n15 = sum(n5, n10)),
% 52.61/52.92      inference(symmetry,[status(thm)],[973])).
% 52.61/52.92  tff(6496,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n4, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[94, 6466])).
% 52.68/52.92  tff(6497,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = n18),
% 52.68/52.92      inference(transitivity,[status(thm)],[6496, 378])).
% 52.68/52.92  tff(6498,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n6)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6468, 91])).
% 52.68/52.92  tff(6499,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = n18),
% 52.68/52.92      inference(transitivity,[status(thm)],[6498, 375])).
% 52.68/52.92  tff(6500,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n18, n18)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6499, 6497])).
% 52.68/52.92  tff(6501,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(transitivity,[status(thm)],[6500, 374, 6495, 6494])).
% 52.68/52.92  tff(6502,plain,
% 52.68/52.92      ($false),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[60, 6501])).
% 52.68/52.92  tff(6503,plain,(~(Y!0 = n5)), inference(lemma,lemma(discharge,[]))).
% 52.68/52.92  tff(6504,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n18)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6470, 160])).
% 52.68/52.92  tff(6505,plain,
% 52.68/52.92      (sum(n5, n18) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(symmetry,[status(thm)],[6504])).
% 52.68/52.92  tff(6506,plain,
% 52.68/52.92      (n2 = sum(n5, n18)),
% 52.68/52.92      inference(symmetry,[status(thm)],[2161])).
% 52.68/52.92  tff(6507,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n8, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[158, 6466])).
% 52.68/52.92  tff(6508,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = n1),
% 52.68/52.92      inference(transitivity,[status(thm)],[6507, 1145])).
% 52.68/52.92  tff(6509,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n10)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6468, 155])).
% 52.68/52.92  tff(6510,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = n1),
% 52.68/52.92      inference(transitivity,[status(thm)],[6509, 983])).
% 52.68/52.92  tff(6511,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n1, n1)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6510, 6508])).
% 52.68/52.92  tff(6512,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(transitivity,[status(thm)],[6511, 599, 6506, 6505])).
% 52.68/52.92  tff(6513,plain,
% 52.68/52.92      ($false),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[60, 6512])).
% 52.68/52.92  tff(6514,plain,(~(Y!0 = n9)), inference(lemma,lemma(discharge,[]))).
% 52.68/52.92  tff(6515,plain,
% 52.68/52.92      (succ(n13) = succ(X!1)),
% 52.68/52.92      inference(symmetry,[status(thm)],[6465])).
% 52.68/52.92  tff(6516,plain,
% 52.68/52.92      (succ(Y!0) = succ(X!1)),
% 52.68/52.92      inference(transitivity,[status(thm)],[326, 6515])).
% 52.68/52.92  tff(6517,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(Y!0)) = sum(pred(Y!0), succ(X!1))),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6516])).
% 52.68/52.92  tff(6518,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6468, 327])).
% 52.68/52.92  tff(6519,plain,
% 52.68/52.92      (sum(n12, n14) = sum(pred(X!1), succ(Y!0))),
% 52.68/52.92      inference(symmetry,[status(thm)],[6518])).
% 52.68/52.92  tff(6520,plain,
% 52.68/52.92      (sum(pred(X!1), succ(X!1)) = sum(pred(X!1), succ(Y!0))),
% 52.68/52.92      inference(transitivity,[status(thm)],[6469, 6519])).
% 52.68/52.92  tff(6521,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1)))),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6520, 6517])).
% 52.68/52.92  tff(6522,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(symmetry,[status(thm)],[6521])).
% 52.68/52.92  tff(6523,plain,
% 52.68/52.92      ($false),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[60, 6522])).
% 52.68/52.92  tff(6524,plain,(~(Y!0 = n13)), inference(lemma,lemma(discharge,[]))).
% 52.68/52.92  tff(6525,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n0)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6470, 425])).
% 52.68/52.92  tff(6526,plain,
% 52.68/52.92      (sum(n5, n0) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(symmetry,[status(thm)],[6525])).
% 52.68/52.92  tff(6527,plain,
% 52.68/52.92      (n5 = sum(n5, n0)),
% 52.68/52.92      inference(symmetry,[status(thm)],[3351])).
% 52.68/52.92  tff(6528,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n20, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[423, 6466])).
% 52.68/52.92  tff(6529,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = n13),
% 52.68/52.92      inference(transitivity,[status(thm)],[6528, 1086])).
% 52.68/52.92  tff(6530,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n1)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6468, 420])).
% 52.68/52.92  tff(6531,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = n13),
% 52.68/52.92      inference(transitivity,[status(thm)],[6530, 2835])).
% 52.68/52.92  tff(6532,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n13, n13)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6531, 6529])).
% 52.68/52.92  tff(6533,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(transitivity,[status(thm)],[6532, 51, 6527, 6526])).
% 52.68/52.92  tff(6534,plain,
% 52.68/52.92      ($false),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[60, 6533])).
% 52.68/52.92  tff(6535,plain,(~(Y!0 = n0)), inference(lemma,lemma(discharge,[]))).
% 52.68/52.92  tff(6536,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n2)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6470, 635])).
% 52.68/52.92  tff(6537,plain,
% 52.68/52.92      (sum(n5, n2) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(symmetry,[status(thm)],[6536])).
% 52.68/52.92  tff(6538,plain,
% 52.68/52.92      (n7 = sum(n5, n2)),
% 52.68/52.92      inference(symmetry,[status(thm)],[1041])).
% 52.68/52.92  tff(6539,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n0, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[633, 6466])).
% 52.68/52.92  tff(6540,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = n14),
% 52.68/52.92      inference(transitivity,[status(thm)],[6539, 2643])).
% 52.68/52.92  tff(6541,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n2)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6468, 630])).
% 52.68/52.92  tff(6542,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = n14),
% 52.68/52.92      inference(transitivity,[status(thm)],[6541, 1036])).
% 52.68/52.92  tff(6543,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n14, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6542, 6540])).
% 52.68/52.92  tff(6544,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(transitivity,[status(thm)],[6543, 192, 6538, 6537])).
% 52.68/52.92  tff(6545,plain,
% 52.68/52.92      ($false),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[60, 6544])).
% 52.68/52.92  tff(6546,plain,(~(Y!0 = n1)), inference(lemma,lemma(discharge,[]))).
% 52.68/52.92  tff(6547,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n4)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[1626, 797])).
% 52.68/52.92  tff(6548,plain,
% 52.68/52.92      (sum(n5, n4) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(symmetry,[status(thm)],[6547])).
% 52.68/52.92  tff(6549,plain,
% 52.68/52.92      (n9 = sum(n5, n4)),
% 52.68/52.92      inference(symmetry,[status(thm)],[1316])).
% 52.68/52.92  tff(6550,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = sum(n1, n14)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[795, 1622])).
% 52.68/52.92  tff(6551,plain,
% 52.68/52.92      (sum(pred(Y!0), succ(X!1)) = n15),
% 52.68/52.92      inference(transitivity,[status(thm)],[6550, 1101])).
% 52.68/52.92  tff(6552,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = sum(n12, n3)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[1624, 792])).
% 52.68/52.92  tff(6553,plain,
% 52.68/52.92      (sum(pred(X!1), succ(Y!0)) = n15),
% 52.68/52.92      inference(transitivity,[status(thm)],[6552, 1722])).
% 52.68/52.92  tff(6554,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n15, n15)),
% 52.68/52.92      inference(monotonicity,[status(thm)],[6553, 6551])).
% 52.68/52.92  tff(6555,plain,
% 52.68/52.92      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.92      inference(transitivity,[status(thm)],[6554, 513, 6549, 6548])).
% 52.68/52.92  tff(6556,plain,
% 52.68/52.92      ($false),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[60, 6555])).
% 52.68/52.92  tff(6557,plain,((~(X!1 = n13)) | (~(Y!0 = n2))), inference(lemma,lemma(discharge,[]))).
% 52.68/52.92  tff(6558,plain,
% 52.68/52.92      (~(Y!0 = n2)),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[6557, 6464])).
% 52.68/52.92  tff(6559,plain,
% 52.68/52.92      ((Y!0 = n1) | (Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13) | (Y!0 = n0)),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[5759, 6558])).
% 52.68/52.92  tff(6560,plain,
% 52.68/52.92      ((Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5) | (Y!0 = n9) | (Y!0 = n13)),
% 52.68/52.92      inference(unit_resolution,[status(thm)],[6559, 6546, 6535])).
% 52.68/52.92  tff(6561,plain,
% 52.68/52.92      ((Y!0 = n14) | (Y!0 = n15) | (Y!0 = n6) | (Y!0 = n5)),
% 52.68/52.93      inference(unit_resolution,[status(thm)],[6560, 6524, 6514])).
% 52.68/52.93  tff(6562,plain,
% 52.68/52.93      ((Y!0 = n14) | (Y!0 = n15)),
% 52.68/52.93      inference(unit_resolution,[status(thm)],[6561, 6503, 6492])).
% 52.68/52.93  tff(6563,plain,
% 52.68/52.93      (Y!0 = n14),
% 52.68/52.93      inference(unit_resolution,[status(thm)],[6562, 6481])).
% 52.68/52.93  tff(6564,plain,
% 52.68/52.93      (succ(Y!0) = succ(n14)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6563])).
% 52.68/52.93  tff(6565,plain,
% 52.68/52.93      (succ(Y!0) = n15),
% 52.68/52.93      inference(transitivity,[status(thm)],[6564, 11])).
% 52.68/52.93  tff(6566,plain,
% 52.68/52.93      (pred(Y!0) = pred(n14)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6563])).
% 52.68/52.93  tff(6567,plain,
% 52.68/52.93      (pred(Y!0) = n13),
% 52.68/52.93      inference(transitivity,[status(thm)],[6566, 279])).
% 52.68/52.93  tff(6568,plain,
% 52.68/52.93      (sum(pred(Y!0), succ(Y!0)) = sum(n13, n15)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6567, 6565])).
% 52.68/52.93  tff(6569,plain,
% 52.68/52.93      (sum(pred(Y!0), succ(Y!0)) = n7),
% 52.68/52.93      inference(transitivity,[status(thm)],[6568, 10])).
% 52.68/52.93  tff(6570,plain,
% 52.68/52.93      (sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0))) = sum(n5, n7)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6470, 6569])).
% 52.68/52.93  tff(6571,plain,
% 52.68/52.93      (sum(n5, n7) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.93      inference(symmetry,[status(thm)],[6570])).
% 52.68/52.93  tff(6572,plain,
% 52.68/52.93      (n12 = sum(n5, n7)),
% 52.68/52.93      inference(symmetry,[status(thm)],[25])).
% 52.68/52.93  tff(6573,plain,
% 52.68/52.93      (sum(pred(Y!0), succ(X!1)) = sum(n13, n14)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6567, 6466])).
% 52.68/52.93  tff(6574,plain,
% 52.68/52.93      (sum(pred(Y!0), succ(X!1)) = n6),
% 52.68/52.93      inference(transitivity,[status(thm)],[6573, 2212])).
% 52.68/52.93  tff(6575,plain,
% 52.68/52.93      (sum(pred(X!1), succ(Y!0)) = sum(n12, n15)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6468, 6565])).
% 52.68/52.93  tff(6576,plain,
% 52.68/52.93      (sum(pred(X!1), succ(Y!0)) = n6),
% 52.68/52.93      inference(transitivity,[status(thm)],[6575, 5269])).
% 52.68/52.93  tff(6577,plain,
% 52.68/52.93      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(n6, n6)),
% 52.68/52.93      inference(monotonicity,[status(thm)],[6576, 6574])).
% 52.68/52.93  tff(6578,plain,
% 52.68/52.93      (sum(sum(pred(X!1), succ(Y!0)), sum(pred(Y!0), succ(X!1))) = sum(sum(pred(X!1), succ(X!1)), sum(pred(Y!0), succ(Y!0)))),
% 52.68/52.93      inference(transitivity,[status(thm)],[6577, 127, 6572, 6571])).
% 52.68/52.93  tff(6579,plain,
% 52.68/52.93      ($false),
% 52.68/52.93      inference(unit_resolution,[status(thm)],[60, 6578])).
% 52.68/52.93  % SZS output end Proof
%------------------------------------------------------------------------------